[soah]

It depends on what his hand range is, what he thinks you limp UTG with, what he'll do with various hands if you check, what he'll do with various hands if you bet, what he'll do on the turn with those hands depending on what you did on the flop... which in turn is influenced by what happened on all the other hands you played against him.

On this type of board there aren't going to be many hands that he's going to want to put a lot of chips in with besides bigger sets and draws, unless you're lucky enough to catch him with 99 or something. Sometimes I just start shoving money in the pot here and hope something good happens. Sometimes I'll take it slow and hope the clubs miss and "bluff" the river. It just depends...