Grovel, offering punch and whiskey to wife (6)
I believe the answer is:
kowtow
'grovel' is the definition.
(I've seen this before)
'punch and whiskey to wife' is the wordplay.
'punch' becomes 'ko' (KO punch is an example).
'and' is a charade indicator (letters next to each other).
'whiskey' becomes 'W' (alpha bravo charlie delta ...).
'wife' becomes 'w'.
'ko'+'w'+'to'+'w'='KOWTOW'
'offering' is the link.
(Other definitions for kowtow that I've seen before include "Kneel in submission" , "Chinese submissive gesture" , "Abase oneself" , "Be excessively subservient" , "Be over-subservient" .)