Dance in a line (5)
I believe the answer is:
conga
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dance in a line</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 conga that I've seen before include "Line-dancing" , "wiggling line" , "Latin American dance with three steps and a kick" , "Lined-up dance" , "Snaking Latin American dance" .)