Express affection introducing fancy bun to Wine Society (3,5)
I believe the answer is:
rub noses
'express affection introducing fancy' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'bun to wine society' is the wordplay.
I cannot really see how this works, but
an anagram of 'bun' is 'ubn' which is within the answer.
'wine' could be 'rose' (rose is a kind of wine) and 'rose' is present in the remaining letters.
'society' could be 's' (common abbreviation in names of organisations) and 's' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?