how do I work around invasive Bermuda grass?

I have a lawn fescue and Bermuda grass. I'd like go overseed with clover this fall but I'm concerned the Bermuda is going to choke anything else out. It isn't native here and it gets into everything. Killing my lawn first isn't really an option as the Bermuda will creep back in. How can I move toward a more sustainable yard with this awful Bermuda going wild?