Imitative artistic work (8)
I believe the answer is:
pastiche
'imitative artistic work' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for pastiche that I've seen before include "Imitative work of art" , "Work of mixed styles" , "Smorgasbord" , "Mix-up" , "Patches I apply to composition drawn from various sources" .)