Dance club (5)
I believe the answer is:
disco
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dance club</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 disco that I've seen before include "Modern dance hall or event, in brief" , "Dancehall with recorded music, in short" , "Public dance hall with recorded music" , "Dance club with recorded music" , "Demonic spirit" .)