Beer cask (3)
'beer cask' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for keg that I've seen before include "Sort of beer" , "What's found at King's Head" , "Barrel as for beer" , "Small beer cask" , "Small cask or barrel" .)
'beer cask' is the definition.
(large container for beer)
This is all the clue.
(Other definitions for tun that I've seen before include "Large cask for liquid" , "beer barrel" , "Barrel holding many gallons" , "Container of beer" , "One can hold wine" .)