A second drink for the wife? (5,4)
I believe the answer is:
other half
'the wife?' is the definition.
(thesaurus)
'a second drink for' is the wordplay.
'a second' becomes 'other' (I've seen this before).
'drink for' becomes 'half' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'other'+'half'='OTHER HALF'
Can you help me to learn more?
(Other definitions for other half that I've seen before include "Dutch" , "Wife or hubby" , "people better off than us?" , "Spouse" , "partner" .)