Bullet casing (9)
I believe the answer is:
cartridge
'bullet casing' is the definition.
(a cartridge contains a bullet and a charge)
This is all the clue.
(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" .)