"Finian's Rainbow" star (7)
I believe the answer is:
astaire
'finian's rainbow star' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for astaire that I've seen before include "A satire about Fred, great Hollywood dancer" , "Fred - - (films)" , "US dancer (Top Hat)" , "dance performer" , "Fred --, dancer/actor" .)