Top room (5)
I believe the answer is:
attic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">top room</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 attic that I've seen before include "Of Athens" , "Upstairs room" , "of Greek region" , "Small room at the top" , "Classically elegant" .)