Bop (5)
I believe the answer is:
dance
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bop</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 dance that I've seen before include "Reel, say" , "the twist, perhaps?" , "Caned (anag.)" , "Jig, say" , "Ball; hop" .)