Violently kill (4)
I believe the answer is:
slay
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">violently kill</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for slay that I've seen before include "Violently kill" , "Butcher" , "Kill intentionally" , "Kill, murder" , "Kill (literary)" .)