Yeah, i think we have to fold turn. He lead into 4 other people on the flop so he definitely has a hand, and a10 is far from the nuts on this board. I'm not even that happy calling his flop lead because it looks like he will shove the turn a lot, but i think top two is good enough. If he is a big fish or spewtard then there could be a case made for stacking off here because he might be leading with Ax with a heart or just top pair, but in general your hand shouldn't do that well against his range. To avoid this spot though, we should just be flatting his preflop raise instead of 3 betting. A10ss flops well so we don't mind seeing a multiway flop. By 3 betting we allow him to 4 bet and blow us off our hand, and we also bloat the pot. We also squeeze out some of the hands we dominate such as suited connectors, and suited aces. If we flop top pair or two pair on a bad board (as in this case), we would much rather have the pot around 300 than 900. It makes it much easier to pot control and get to showdown with hands we don't want to put our whole stack in with.