Twister (7)
I believe the answer is:
tornado
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">twister</span>' is the definition.<br/ ><span class="explanation-format__explanation">(term for a tornado)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tornado that I've seen before include "wind-up" , "Violent swirling wind" , "threat" , "Funnel-shaped windstorm" , "Funnelling wind" .)