Packing heat (5)
I believe the answer is:
armed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">packing heat</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 armed that I've seen before include "Provided with weapons" , "ready for exchange?" , "ready to fight" , "Gave weapon" , "Carrying a weapon" .)