Elaborate my line / tell me if you do anything else here

Field had 82 runners w/ 13 left and 10 cash. Avg stack is 65k and blinds 1/2k/200

Hero and Villain have played before togather and have some mediocre past.

Have played at the same table ~2h. I had position on him and have 3betted him alot and twice 4bet shipped on him but mostly with goods. One noticable pot took place around 45 min earlier when villain opened HJ and Hero flatted sb w/ 77 BB folded

Flop was K87

Hero c/c 1/2 PSB

Turn was 9

Hero lead out 1/5th and villain raise/folded to my 4bet jam.

Only showdown from this tourny I remember was 2 hands ago when Villain opened HJ and we called AT BB folded
Pot was ~11k
Flop ran out AA9 and action went c/c
Turn J
Hero lead out 6k and he called kinda fast
River 2
I tanked and betted 15k and he folded face up KK

On to the hand - Hero 75k , Villain covers

Folded to Hero who has T9 and opens to 4k from MP1 and Villain is only caller from BB.
Flop
8 5 2
Villain checks and Hero bets 5k and he calls after some time
Turn is 7
He thinks like literally 2-3 sec and bets 9k and Hero calls.
River is 3
After river hit Villain tanked first time in whole tourny so long that 1 another player called the CLOCK on him (guess like 2-3min) and after he was announced he had ~30 sec left he jammed

Hero is like wtf ? Could tell he seemed he was fake tanking it but cant be sure ... is it auto call or would I be nit if I would lay this hand down ? would still have a decent stack and edge over weak field since Villain is 1 of the best left in the tourny.

You have 37k pot otr w/ ~55k behind.

I`d call.
You should be ahead a little more often than 1 out of 3 to make it a profitable call.

I think he would have sets more often than Ac7c, for example. And he`d lead or c/r Axss some of the times otf as well.

Though, I`m unsure why would he lead set on that turn card. Probably he has exactly 77.