Church screen (7)
I believe the answer is:
reredos
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">church screen</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 reredos that I've seen before include "Fireback" , "Church feature" , "Ornamental screen behind a church altar" , "Back of fireplace" , "Wall decoration behind altar" .)