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Be careful what you wish for as clowns can sometimes be to rough with frogspawn and hammers and can damage them. Mine host my hammer but is gentle. I have a friend that his would kill every coral that it hosts.
There's a local shop here with a big B&W clown that hosts a FS in their display. The coral can also harm the fish over time.... it has no pelvic fin now, but seems no worse for wear and keeps hosting it.