NL50 SH AJs 3bet pot

Im not sure if the call pre is correct. As played this is ok.

Call pre could be correct, it depends on villain and table dynamics. It is a bit on the marginal side of the calls though... villains value 3betting range crushes AND dominates us.

Flop call is fine IMO, on the turn I call again, because I think the implied odds are pretty awesome since when we hit villain will have a set somewhat often and we get his stack. Besides, we might still be able to pick the pot up on the river if villain checks, I guess he would barrel AQ here. I'm not saying we're always gonna bet river if he checks to us, but it's obviously a possibility.

If turn is a spade, I think that's all the more reason to call. We have a disguised flush draw which promises to get paid if we hit.

By semi bluffing this turn, the only better hand that folds is AQ...

you are getting ~25-27% pot odds
You have 17% equity on the turn
Pretty marginal call, but could be ok. Hitting the 9 would be really obvious so maybe you don't get paid off as much.