Grunch.
Fold preflop UTG. If it is a passive table and you are pretty sure you'll have six to a flop regardless of raises, then I'd limp in here. You definitely don't need to be making people fold. On the flop you are getting 16-1 pot odds. The backdoor flush is worth 1.5 outs, probably discount the ace to 1.5 (although that might be high). I raise this hand, calling a 3-bet and folding the turn unless an ace or a card that helps our draw comes out. Depending on how passive BB is, this could buy you a free turn card.