Theatrical background (7)
I believe the answer is:
scenery
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">theatrical background</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for scenery that I've seen before include "Theatrical background" , "Stage background" , "On-stage background" , "Landscape features" , "Attractive landscape" .)