Horse drinking whiskey gets drunk (6)
I believe the answer is:
stewed
'drunk' is the definition.
(I've seen this before)
'horse drinking whiskey' is the wordplay.
'horse' becomes 'steed' (steed is a kind of horse**).
'drinking' means one lot of letters goes inside another.
'whiskey' becomes 'w' (alpha bravo charlie delta ...).
'steed' going around 'w' is 'STEWED'.
'gets' is the link.
(Other definitions for stewed that I've seen before include "Was long embarrassed" , "Of tea, brewed too long" , "Drunk; cooked in pot" , "canned" , "(Meat) simmered; (tea) over-infused" .)