Tempest (5)
I believe the answer is:
storm
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tempest</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that tempest can be written as storm)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for storm that I've seen before include "rage" , "Violent weather condition" , "Awful blow" , "Rampage" , "rave" .)