Second drink, Bordeaux? (7)
I believe the answer is:
support
'second' is the definition.
(I've seen this before)
'drink bordeaux?' is the wordplay.
'drink' becomes 'sup' (to sup is to drink).
'bordeaux?' becomes 'port' (I can't explain this - if you can you should give a lot more credence to this answer).
'sup'+'port'='SUPPORT'
Can you help me to learn more?
(Other definitions for support that I've seen before include "base" , "Cheer" , "strengthen" , "Bear; corroborate" , "Shore up" .)