Hand-thrown bomb (7)
I believe the answer is:
grenade
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hand-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 "Handy bomb" , "Hand-thrown explosive" , "Hand-thrown bomb" , "Bomb with a pin" , "Small bomb thrown by hand" .)