Greek theater (5)
I believe the answer is:
odeon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greek theater</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for odeon that I've seen before include "Hal" , "old theatre" , "dramas here" , "Greek music hall" , "Ancient theatre - modern cinema" .)