Cheers when getting to the end of the drink (7,2)
I believe the answer is:
bottoms up
'cheers' is the definition.
(both can be said before having a drink)
'getting to the end of the drink' is the wordplay.
I cannot really understand how this works, but
'to' is present in the answer.
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'of' could be 'o' and 'o' is found in the answer.
'drink' could be 'sup' (to sup is to drink) and 'sup' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'when' is the link.
Can you help me to learn more?
(Other definitions for bottoms up that I've seen before include "Your good health!" , "Down the hatch!" , "Toast" , "down it goes!" , "Cheers!" .)