Sailors' dance (8)
I believe the answer is:
hornpipe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sailors' dance</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 hornpipe that I've seen before include "piece of music for an > old dance" , "Obsolete instrument: naval dance" , "Lively jig" , "Lively old sailors' dance" , "Lively solo dance associated with sailors" .)