Imitative work of art (8)
I believe the answer is:
pastiche
'imitative work of art' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for pastiche that I've seen before include "Artistic work in someone else's style" , "Mixture of styles and/or materials -- it's cheap (anag)" , "Operatic song" , "Work of art in the style of another" , "Patches I assembled to work from several sources" .)