Imitative work of art (8)
I believe the answer is:
pastiche
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">imitative work of art</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)