Drive husband to drink, being contrary (4)
I believe the answer is:
push
'drive' is the definition.
(push is a kind of drive)
'husband to drink being contrary' is the wordplay.
'husband' becomes 'h'.
'to drink' becomes 'sup' (I've seen this before**).
'being contrary' says the letters should be written backwards.
'h'+'sup'='hsup'
'hsup' in reverse letter order is 'PUSH'.
(Other definitions for push that I've seen before include "Force one's way (through)" , "Promote - drive" , "Strongly promote" , "Offensive - press" , "What often proverbially comes to "shove"?" .)