Defuse (6)
I believe the answer is:
disarm
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">defuse</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 disarm that I've seen before include "Take away weapons or make less angry" , "Win the confidence (of)" , "Mollify or remove weapon from" , "Demilitarise" , "Make less angry or deprive of weapons" .)