Sunder (5)
I believe the answer is:
sever
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sunder</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sever that I've seen before include "Divorce" , "Divide, cut" , "Cut apart, maybe a relationship" , "Cut completely" , "Cut off suddenly" .)