Jellyfish (6)
I believe the answer is:
medusa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jellyfish</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for medusa that I've seen before include "Amused by the mythical gorgon?" , "One of three sisters with snakes for hair" , "Form of jellyfish" , "Petrifying woman" , "all her visitors got stoned" .)