Couturier Christian ____ (4)
I believe the answer is:
dior
'couturier christian' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dior that I've seen before include "Christian ..., couturier" , "French couturier, creator of the New Look, d. 1957" , "Fashion icon, Christian?" , "Fashion designer Christian, famous for his 1947 New Look" , "Christian --, French clothes designer" .)