mine seems to take tenticales into his mouth but i woudnt say he bite's em... More like a gental suck and blow.
My clown does tend to beat him down pretty good when he closes up a bit. He always wants inside.
I dont know with a clown+ane of your size, mine is the other way, my clown is around 3" but my anemone is almost 1' accross. Hes nearing basketball size when fully expanded. So that little clownfish cant even phase him on a good day.