Actress and singer dear to the French (4)
I believe the answer is:
cher
This clue is a double definition.
'actress and singer' is the first definition.
'dear to the french' is the second definition.
('dear' in French)
(Other definitions for cher that I've seen before include "Sonny and - -" , "Singer; dear (French)" , "US singer/actress - French river/department" , "US singer; dear (Fr.)" , "1987 Best Actress Oscar winner for "Moonstruck"" .)