I like a flop raise.

It may get the better post flop players to fold, it gets the weak UTG to slow down and the obvious free card benefits.

You've got minimum 15% equity in a humungoid pot and already 2 players in the pot. The free card doesn't have to come very often to be profitable.

If I didn't have the read on UTG, I might favour a call.

BTW. I doubt you're clearing up any outs with a raise.