Large cask or barrel (3)
I believe the answer is:
tun
This clue is a double definition.
'large cask' is the first definition.
(type of container for alcohol)
'barrel' is the second definition.
(I know that tun is a type of barrel)
(Other definitions for tun that I've seen before include "Large cask (holding 252 gallons)" , "'Large cask, for beer perhaps (3)'" , "Nut found in large cask" , "butt" , "Large cask for liquid" .)