Drink in The Feathers? (4)
I believe the answer is:
down
I believe this is a double definition.
'drink' is the first definition.
(to down something can mean to drink it quickly)
'the feathers?' is the second definition.
(down is a kind of feathers)
'in' acts as a link.
(Other definitions for down that I've seen before include "Depressed - Irish county" , "Not working (computer)" , "Depressed; swallow" , "Feathers or hair" , "Sad; feathers" .)