My clues:
For writing, I had both pound (writing on the money) and pan with some equity for the fourth word. Didn't even think about king
For kindling, I was going for litter; didn't consider sound. I felt there was a better clue that could capture match/straw/litter but couldn't think of it
And fry-up was a hail mary to encompass pan, pound (because it's British), and trip (likewise), with the hope that you could then potentially clean up litter (haha)
We had a bit of a tough road