A Fauve painter whose work Nu Bleu was burned in effigy in 1913 (7)
I believe the answer is:
matisse
(Other definitions for matisse that I've seen before include "French impressionist" , "Henri ---, Fauvist painter" , "Henri -, C twenty Fr. painter, sculptor, illustrator" , "French painter, d. 1954" , "Henri --, French artist" .)