Swivel (5)
I believe the answer is:
pivot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">swivel</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pivot that I've seen before include "Swivel" , "Point of rotation" , "Key figure" , "Point about which something turns" , "Pin, centre of revolution" .)