Erik,

I have seen clowns beat up on smaller anemones, but i don't think it's a reaction that you see 100% of the time. when my original RBTA died (tank overheated) it took months, it bleached split, and then the two halves shrunk (could not initiate a feeding response any longer) over the course of months.

The clowns (maroons) didn't care it was bleaced and kept right along hosting in them, but as the anemones got smaller the clowns just lost interest and left them alone.

rather than remove the anemone, I would try to isolate the clowns - clowns are tough as heck, while anemones are sensetive - keep the anemone in the main tank, feed the trash out of it and get it big, and either isolate the clowns behind some egg crate or something, or move them to a different tank.

my two cents. good luck!