Gyrate, twirl (6)
I believe the answer is:
rotate
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">gyrate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">twirl</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for rotate that I've seen before include "Gyrate" , "Whisk round" , "Revolve" , "Alternate" , "Turn around on axis or central point" .)