Equipping with weapons (6)
I believe the answer is:
arming
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">equipping with weapons</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 arming that I've seen before include "preparing for the fray" , "Equipping for war" , "Equipping with weapons" , "Providing with weapons" , "Taking up weapons" .)