Put the lid on drink (6)
I believe the answer is:
scotch
I believe this clue is a double definition.
'put the lid on' is the first definition.
(I've seen this before)
'drink' is the second definition.
(Scotch is an example)
(Other definitions for scotch that I've seen before include "Thwart - sort of broth, mist or egg" , "Alcoholic spirit" , "Finish off" , "Put paid to - whisky" , "Cut - wedge - whisky" .)