Father of Fauvism (7)
I believe the answer is:
matisse
'father of fauvism' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for matisse that I've seen before include "Henri -, nineteenth-twentieth century French painter/sculptor" , "Henri ---, Twentieth Century painter" , "Henri --, French artist" , "20th century French painter" , "Leading fauvist painter, d. 1954" .)