Beer container (6)
I believe the answer is:
barrel
'beer container' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for barrel that I've seen before include "Beer measure; gun part" , "Cheerful old song: 'Roll out the . . . . . .'" , "Cylindrical crate" , "Large keg" , "Beer cask" .)