Fire container (4)
I believe the answer is:
sack
I believe this clue is a double definition.
'fire' is the first definition.
(dismiss someone from their job)
'container' is the second definition.
(type of bag)
(Other definitions for sack that I've seen before include "Fire the large bag?" , "Large canvas bag" , "Fire the old drink?" , "It carries coal" , "Dismiss; an old wine" .)