I wouldn't worry about it, black ocellaris host naturally in much nastier anemones than a condy.
My two ocellaris ave shared a tank with a condy for about 1.5 years now, and could care less about it. Further the condy, in it's prime, wasn't strong enough to kill and eat a 1" flounder, it sure as hell isn't going to hurt a 2-3" clown.