Villain is completely unknown, played like 10 hands with him. I think pre-flop and flop is standard. What is your play on turn with villains's awkward stacksize???

seems fine, fold now..too deep to get involved with only one pair hands

Why bet the turn? Worse hands fold (except for single spades, which he'll often shove) and better hands call or raise.

I x/c turn and hope to get to showdown.

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4 bet pre.
bet flop.

No way. If villain shoves you really want to play AQs for 50bb?

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i like it up until the turn, but here i think we have to c/c

I think I know why you bet, for protection right, you want to charge the spade to draw to the flush.

The problem with betting the turn is we allow ourselves to get raised and put us in a position for the turn to be played for x2 bets, if we check and call we can cap the turn betting to only x1 bet. Our hand has good SDV and we dont want to be raised off it at this stage. Just check turn and call if he bets. If a another blank peels river call again, if a spade comes on the river it could be a scare card for him and shut him down if he doesn't have it. If he bets the fourth spade he likely has it unless we have reads to suggest otherwise.