I wouldn't put them back together again. I agree with Rocky709, get rid of one of them, and get a smaller one next time. It's easier to introduce a smaller clownfish to a larger one than the other way around. I had two clowns together for 4 months and the larger one picked on the smaller one all the time. I finally took the smaller one out, waited 2 more months and put another one in the tank with her. She liked him right off and they get along great.
If you want to try and put them together again, you might try catching the smaller one and putting it in the 10 gallon with the female.