Tear violently (4)
I believe the answer is:
rend
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tear violently</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rend that I've seen before include "Tear violently" , "Tear to pieces" , "Cleave" , "Tear apart roughly" , "Tear, sunder" .)