Put paid to the whisky (6)
I believe the answer is:
scotch
I believe this is a double definition.
'put paid to' is the first definition.
(I've seen this before)
'whisky' is the second definition.
(I know that Scotch is a type of whisky)
'the' acts as a link.
(Other definitions for scotch that I've seen before include "Type of egg" , "Put an end to - as Jock might?" , "Put an end to the whiskey" , "dish" , "providing nursery facility in school" .)