I would agree that UTG probably has a set of aces. Also, since he would have to have the ace of clubs, he probably doesn't have another club since he didn't raise the river (although it would be too late to do anything by then anyways).
You have a good chance to scoop this pot, however since BB stayed in this hand all the way he probably has 23XX. If you get unlucky and get quartered, so be it, you played the hand properly.