Be flexible about home for unsold wine (3,3)
I believe the answer is:
bin end
'unsold wine' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'be flexible about home' is the wordplay.
'be flexible' becomes 'bend' (I've seen this in another clue).
'about' means one lot of letters goes inside another.
'home' becomes 'in' ('he's home' can mean 'he's in').
'bend' enclosing 'in' is 'BIN-END'.
'for' acts as a link.
Can you help me to learn more?
(Another definition for bin end that I've seen is " Only bottle perhaps".)