Fashion designer Saint Laurent (4)
I believe the answer is:
yves
'fashion designer saint laurent' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yves that I've seen before include "-- Saint-Laurent, couturier" , "Montand, Fr. actor" , "French man" , ". . . . Saint Laurent, fashion designer" , "French male name" .)