There can be the use of language that might indicate one type of clue but it is actually not. For example, cocktail might imply that there is an anagram but, in fact it is not an anagram. This is a very simple clue with the answer at the front and the building block instructions at the back.
Sometimes cryptic clues rely upon cultural knowledge of the solver. Which is why English cryptics might be hard for Americans or Australians or vice versa.

Painting = art

Interior means that art is inside of a word for a small car.
In this case the small car is an English mini minor.

Ergo Answer is Martini

Now if you are struggling with getting these - do not be disheartened. When you do a crossword yourself you will have the benefit of crossletter clues.
For example: having the i of martini ending your possible solution would be a big pointer to solving this clue.
_ _ _ _ _ _ i ; can you see how that might make the clue alot easier, either it is a small car ending with i OR a cocktail ending with i...

Double definition: Some clues are built with two phrases that mean the same thing. Often one of the clues is cryptic - this can be indicated by a question mark at the end. Although you should not always pay attention to any punctuation mark, as they themselves can be used to hide or distract the solver. However, in this case, it indicates the irony of the answer.
Some answers can be multi-word. Sometimes they can be multi- entries e.g. 7 Down, 12 Across........(5,6) Means the 7 down is 5 letter word and the 12 across clue is 6 letters. Even rarer if there is a number within the clue it might in fact refer to the answer of a previous clue.

Anyway back to this clue...
Thoroughly modern and ready for romance? (2-2-4)


Thoroughly modern - is to be up-to date.
Which if you think about it is also - be ready for upto and a date is obviously where romance is intended to take place.

Answer : up-to-date (2-2-4)

See beef producer grow old in a cheap cabin (8)
See: can mean the composite parts appear unaffected in the clue
beef producer: Steer
A castrated male is called a steer in the United States; older steers are often called bullocks in other parts of the world,[18] but in North America this term refers to a young bull. Piker bullocks are micky bulls (uncastrated young male bulls) that were caught, castrated and then later lost.

Grow old: is to age. This is a very common composite building block. Old can indicate O singularly or in this case the stem -age.

Ergo
See beef producer grow old in a cheap cabin (8)
Answer: Steerage

Steerage is the lowest deck of a ship. It comes from steerage that means the steering of ship. The name "steerage" came from the fact that the control lines of the rudder ran on this level of the ship.

The steerage area of the ship was once used to accommodate passengers travelling on the cheapest class of ticket, and offered only the most basic amenities, typically with limited toilet use, no privacy, and poor food. Many immigrants to the United States in the late 18th and early 19th century travelled in this area of the ships.



i.e. in a cheap cabin

Wreathe

it is SPOIL not spoiler on each side with the / on the left bracket.

Bushido

2012 Summer Olympics[edit]

On 9 August 2012 at the 2012 Summer Olympics in London, Rudisha led from start to finish to win gold in what was acclaimed "The Greatest 800 Meter Race Ever".[13] In so doing, he became the first and, so far, only runner to have broken the 1:41 barrier for 800 m.[14] From the start of the race, Rudisha led and pulled away from the rest of the field after 200 metres, completing the first lap in 49.28 seconds. By 600 metres his lead had grown to several metres. He continued to pull away until the final straight, where second place Nigel Amos was able to slightly gain some ground as Rudisha strained. But the gap was much too great to close, and Rudisha crossed the line in a world-record time of 1:40.91.

Rudisha dragged the rest of the field with him to create a historic race whose story, wrote Sports Illustrated's David Epstein, "is best told, perhaps, in 16 letters: WR, NR, PB, PB, PB, NR, SB, PB."[15] The pace was so punishing that the silver medallist, Amos, had to be carried from the track on a stretcher, though his exertion did earn him the world junior record and make him only the fifth man in history to run under 1:42,[16] something Rudisha has now done seven times.[3] "With Rudisha breaking 1:41, two men under 1:42, five under 1:43 and all eight under 1:44," noted the IAAF, "it was the greatest depth 800m race in history."[17] Every single man ran the fastest time in history for their placing.[14] All eight runners set season's bests; seven set personal bests; and three set national records, of which one was also the world junior record while another was the Olympic and world record.[16][18] It was the first time in international 800m history where every competitor ran either a personal or season's best.[19] The time set by the eighth-placed Andrew Osagie, a personal best of 1:43.77, would have won gold at any of the preceding 21st-century Olympics.[20]

As well as being the first man to go below 1:41, he broke his own world record that was set in 2010. "The splits triggered amazement: 23.4 secs for the first 200 m, 25.88 secs for the second, a critical 25.02 for the third and 26.61 to bring it all home."[21] Rudisha's world record was the more notable for the absence of pacemakers to assist him,[15] the latter not being permitted at the Olympics and other major championships. Its difficulty is underlined by the previous person to win an Olympic 800 m final with a world record was Alberto Juantorena, back in 1976.[17] Rudisha also became the first reigning 800 m world champion to win Olympic gold at that distance.[15] Sebastian Coe, organiser of the London Olympics, said: "It was the performance of the Games, not just of track and field but of the Games".[22] He added: "Bolt was good, Rudisha was magnificent. That is quite a big call but it was the most extraordinary piece of running I have probably ever seen."[23] Rudisha had been in good shape coming into the race, having "clocked a staggering 1:42.12 minutes at high altitude in Nairobi during the Kenyan [Olympic] trials. After that he had said 'the race was nice and easy'."[17]

Before the race, Rudisha had joked about his father's 1968 400 m relay silver medal: "It would be good for me to win gold, so we can have gold and silver in our family . . . so I can tell him, 'I am better than you.'"[16] Afterwards, he admitted that it would go down as the greatest 800 race personally for him as well because he won it in front of Sebastian Coe who held the world record in 800 m for more than 16 years. This race was also touted as a run for his community and tribe.

Perhaps I should have revealed it is a down clue.
Capsizing has more significance in down clues as it means you reverse the entry.

Boat = sub which you capsize BUS

Revealed all = Hid nothing - an antonym of reveal is hide + past tense of reveal - ed so we drop the e from hide to hid. O often represents nothing in cryptics.
Revealed all - hido

Capsizing boat revealed all code? (7)


Full answer = Bushido
The word was first used in Japan during the 17th century.[3] It came into common usage in Japan and the West after the 1899 publication of Nitobe Inazō's Bushido: The Soul of Japan.[4]

In Bushido (1899), Nitobe wrote:
...Bushidō, then, is the code of moral principles which the samurai were required or instructed to observe.... More frequently it is a code unuttered and unwritten.... It was an organic growth of decades and centuries of military career.

Bushido is a code.

Evasive, having turned up in fur (5)

Simple construct: sometimes you have to put in words that you are not sure of the answer because you have the parse correct. This is a much lesser sin than knowing the answer but being completely unsure of how the answer is constructed.

Evasive = coy

Having turned up = turn up around = pu
Evasive, having turned up in fur (5)
Answer = coypu



The coypu (from Spanish coipú, from Mapudungun kóypu),[2][3] (Myocastor coypus), also known as the river rat [4] or nutria,[1][5] is a large, herbivorous, semiaquatic rodent and the only member of the family Myocastoridae. Originally native to subtropical and temperate South America, it has since been introduced to North America, Europe, Asia, and Africa, primarily by fur ranchers.[6] Although it is still valued for its fur in some regions, its destructive feeding and burrowing behaviors make this invasive species a pest throughout most of its range.

Obviously must have been hunted for its fur.