Thrown bomb (7)
I believe the answer is:
grenade
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thrown bomb</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 grenade that I've seen before include "Angered (anag)" , "One might go off" , "Bomb with a pin" , "Missile thrown" , "Handy bomb" .)