Let go for a little drink (4)
I believe the answer is:
drop
I believe this clue is a triple definition!
'let go' is the first definition.
(thesaurus)
'for' acts as a link.
'a little' is the second definition.
(a drop is a small amount)
'drink' is the third definition.
(I know that drink is a kind of consume)
(Other definitions for drop that I've seen before include "small amount of alcohol" , "Dispense with - sink" , "Small drink" , "Pendant earring" , "Finish with" .)