I have found that if the clown fish stays in one spot/area then you can move the anemone to that spot/area and it should work they will host. After when the anemone moves the clown will follow,worked for me I hope it works 4 u.
a clown can host anything it wants, lps corals, soft corals, my tomatoe just recently started hosting my condy anenome, which thay have been togethor for about 2 months.