Morse, maybe, back after monsieur with wine (5)
I believe the answer is:
medoc
'wine' is the definition.
(I have seen 'red wine' mean 'medoc' so perhaps 'wine' could also mean 'medoc')
'morse maybe back after monsieur' is the wordplay.
'morse maybe' becomes 'code' (I can't justify this - if you can you should give a lot more credence to this answer).
'back' says the letters should be written in reverse.
'after' says to put letters next to each other.
'monsieur' becomes 'm' (French abbreviation - like Mr for Mister).
'code' reversed gives 'edoc'.
'edoc' put after 'm' is 'MEDOC'.
'with' is the link.
Can you help me to learn more?
(Other definitions for medoc that I've seen before include "Red wine from southwest France" , "Type of wine" , "French intoxicant" , "region of France" , "Wine-growing area" .)