Put an end to booze (6)
I believe the answer is:
scotch
I believe this is a double definition.
'put an end' is the first definition.
(I've seen this before)
'booze' is the second definition.
(Scotch is an example)
'to' is the link.
(Other definitions for scotch that I've seen before include "Whisky from Scotland" , "Put paid to - whisky" , "Decisively put an end to" , "Alcoholic spirit" , "Kind of whisky spelt thus" .)