Pelvis (3)
I believe the answer is:
hip
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pelvis</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hip that I've seen before include "Haunch" , "Side of body - very sophisticated" , "In modern slang, cool and sophisticated" , "Fruit of a rose plant" , "Swinging" .)