Antitank weapon (7)
I believe the answer is:
bazooka
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">antitank weapon</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 bazooka that I've seen before include "Anti-tank gun" , "Portable rocket launcher" , "A portable rocket-launcher" , "Portable anti-tank weapon" , "Anti-tank rocket launcher - trumpet-shaped kazoo" .)