Incorporate Matisse, Ali, Rocky? (10)
I believe the answer is:
assimilate
'incorporate' is the definition.
(thesaurus)
'matisse ali rocky?' is the wordplay.
'rocky?' indicates an anagram (I've seen 'rocky' mean this).
'matisse'+'ali'='matisseali'
'matisseali' with letters rearranged gives 'ASSIMILATE'.
(Other definitions for assimilate that I've seen before include "Take in and understand" , "Absorb and digest (food)" , "pick up" , "thoroughly understood" , "Become part of the prevailing culture" .)