Vehicle with a turret (4)
I believe the answer is:
tank
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vehicle with a turret</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tank that I've seen before include "Large storage chamber" , "Armoured vehicle; large container" , "Combat vehicle" , "Possible alternative to barrel" , "Aquarium; army vehicle" .)