The Godfather star (6)
I believe the answer is:
brando
'the godfather star' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for brando that I've seen before include "heart-throb" , "SECOND PART OF 13" , "FILMSTAR" , "actor in 4 26 21 [A STREETCAR NAMED DESIRE]" , "Hollywood actor" .)