Christian __, French fashion designer (4)
I believe the answer is:
dior
This clue is a double definition.
'christian' is the first definition.
(fashion designer Christian Dior)
'french fashion designer' is the second definition.
(I've seen this before)
(Other definitions for dior that I've seen before include "Fashion icon, Christian?" , "Fashion house" , "French couturier, creator of the New Look in 1947" , "French couturier, creator of the New Look, d. 1957" , "Fashion designer Christian, famous for his 1947 New Look" .)