French wine to embrace European mood (4)
I believe the answer is:
vein
'mood' is the definition.
(I've seen this in another clue)
'french wine to embrace european' is the wordplay.
'french wine' becomes 'vin' ('wine' in French).
'to embrace' is an insertion indicator.
'european' becomes 'E' (abbreviation e.g. EU).
'vin' going around 'e' is 'VEIN'.
(Other definitions for vein that I've seen before include "Distinctive quality" , "Vessel for claret" , "Distinctive style" , "Leaf rib; ore layer in rock" , "Vessel carrying blood towards the heart" .)