Bullet casing (9)
I believe the answer is:
cartridge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bullet casing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(a cartridge contains a bullet and a charge)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cartridge that I've seen before include "Bullet's casing" , "Case for shot, ink, tape, etc" , "round" , "Credit rag (anag)" , "Shotgun shell" .)