Day 2 here, and I swear that they are buddies!
The clown now is the clear alpha fish as the YT damsel defers to him. There isn't any chasing or nipping and they seem to be getting along well. I'm very happy this worked out.
Aerowen, I don't know if adding a RBTA will make any difference, perhaps someone else can chime in. So far, my clown doesn't seem to be hosting anything in particular even though there should be some temptations with my large Torch and Hammer corals.