Dan beat me to the punch. That is what I have done in the past. In fact I did this with both my leucokranos and my thielleis when I didn't have a mate for them. In the case of the leucokranos, I wound up getting a female more than a year later and they paired up without any major glitches.
With my first thiellei, I kept it with a 14 year old A. ocellaris female among others. At one point it was with five or six A. leucokranos, an A. ocellaris and I think a sandaracinos clown. I wound up getting a smaller specamin and they paired up nicely.
Just so nobody gets the wrong idea, I do not advise others to do this unless they have a lot of experience with clowns and know if and when to separate them.