Smallest amount of drink — then away for doze! (4,3)
I believe the answer is:
drop off
'doze' is the definition.
(thesaurus)
'smallest amount of drink then away' is the wordplay.
I cannot really understand how this works, but
'amount' could be 'drop' (drop is a kind of amount) and 'drop' is located in the answer.
'of' could be 'o' and 'o' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for drop off that I've seen before include "Decline, decrease" , "delivery of goods" , "Fall asleep" , "Fall < or crash" .)