A meeting covering European question is enough (8)
I believe the answer is:
adequate
'is enough' is the definition.
('adequate' can be a synonym of 'enough')
'a meeting covering european question' is the wordplay.
'meeting' becomes 'date' (date is a kind of meeting**).
'covering' is an insertion indicator.
'european' becomes 'e' (abbreviation e.g. EU).
'question' becomes 'qu'.
'e'+'qu'='equ'
'date' placed around 'equ' is 'dequate'.
'a'+'dequate'='ADEQUATE'
(Other definitions for adequate that I've seen before include "'Satisfactory, acceptable (8)'" , "plenty" , "'Good enough, all right (8)'" , "Barely sufficient" , "Good enough, acceptable" .)