1) clowns do not host, anemones do
2) the type of anemone you have is not a typical host of the type of clowns you have
3) some clowns accept hosting anemones, while others never do. Some can be trained to as well but I wouldn't try this with the anemone variety you have. Some say wild clowns are more likely to accept an anemone, but I haven't had trouble with either. I've found that its more about having the correct anemone species.