My tomato just started laying in my lta yesterday. And they've been together for 7 months.
he's been hovering around it now and then for about two weeks.
so even after he finds it, and realizes it could be a friend.
There's still a bonding process for fish that aren't use to being with anemones.
on the other hand a wild perc. or tomato will be in it before it hits the bottom.
Ialso have a oscelaris that wants nothing to do with liverock, corals, otherfish, or anemones, he just stays by the top of the tank. (8 months)
give it time
if you want to encorage it then you could put the two in a 10 gallon by themselves and this would increase chances and decrease interferance. But it could also make your clown very territorial!!
my advice would be to just wait, if you want something swimming in the lta now then I would suggest a tomato they seem much more eager to except an anemone.
after tons and tons of research I still know nothing