Understanding there's a buffet and wine (7)
I believe the answer is:
rapport
'understanding' is the definition.
(I've seen this before)
'a buffet and wine' is the wordplay.
'a buffet' becomes 'rap' (I can't explain this - if you can you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'wine' becomes 'port wine' (port is a kind of wine).
'rap'+'port'='RAPPORT'
'there's' acts as a link.
Can you help me to learn more?
(Other definitions for rapport that I've seen before include "Mutual sympathy" , "Harmonious understanding with someone" , "Close and harmonious relationship" , "Mutual harmony and affinity" , "Feeling of sympathy and understanding" .)