Dancing venue (8)
I believe the answer is:
ballroom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dancing venue</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 ballroom that I've seen before include "Hall for dancing" , "Dance hall" , "In which the tango or the foxtrot are danced" , "Dance venue" , "Dance-hall" .)