what kind of clown is it?.....there are only two species known to host in seabaes(what you have)....tomato and clarki.....heres a link to a chart
http://clownfish.webreefs.com/clownfish_anemones.php .....some clowns will host in corals which is really not an ideal relationship......sometimes its works out, other times the clown can end up with stings from the coral and yet other times the clown can "love" the coral to death(depends on what coral the choose to admire)..... the best thing for them really is a nem (of the right flavor of course).....
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).
http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here
http://www.vimeo.com/2304609 and here
http://www.vimeo.com/16591694