Mead brewed with American and European bean (7)
I believe the answer is:
edamame
'bean' is the definition.
(I've seen this before)
'mead brewed with american and european' is the wordplay.
'brewed' indicates anagramming the letters.
'with' means one lot of letters goes inside another.
'american' becomes 'am' (abbreviation in some contexts).
'and' is a charade indicator (letters next to each other).
'european' becomes 'e' (abbreviation e.g. EU).
'mead' with letters rearranged gives 'edam'.
'edam' going around 'am' is 'edamam'.
'edamam'+'e'='EDAMAME'
(Another definition for edamame that I've seen is " type of bean".)