American star who's dear to the French (4)
I believe the answer is:
cher
This could be a double definition.
'american star' is the first definition.
'cher' can be an answer for 'star' (I have seen 'Moonstruck star' mean 'cher' so perhaps 'star' could also mean 'cher'). I'm unsure of the 'american' bit.
'dear to the french' is the second definition.
('dear' in French)
'who's' is the link.
Can you help me to learn more?
(Other definitions for cher that I've seen before include "US singer/actress - French river/department" , "US singer; dear (Fr.)" , "1987 Best Actress Oscar winner for "Moonstruck"" , "Singer; dear (French)" , "Sonny and - -" .)