"Moonstruck" actress (4)
I believe the answer is:
cher
'moonstruck actress' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cher that I've seen before include "US singer/actress - French river/department" , "1987 Best Actress Oscar winner for "Moonstruck"" , "Singer; dear (French)" , "US pop singer" , "Sonny and - -" .)