Violent, tempestuous (6)
I believe the answer is:
raging
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">violent</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">tempestuous</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that tempestuous can be written as raging)</span><br/ ><br/ ></span>
(Other definitions for raging that I've seen before include "Expressing violent anger" , ". . . . . . Bull (Martin Scorsese film)" , "Showing violent anger" , "Furious as storm may be" , "(Of fire or storm) violent" .)