European, Conservative, still overjoyed (8)
I believe the answer is:
ecstatic
'overjoyed' is the definition.
(I've seen this in another clue)
'european conservative still' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'conservative' becomes 'C' (UK political abbreviation).
'still' becomes 'static' (static can mean still or not moving).
'e'+'c'+'static'='ECSTATIC'
(Other definitions for ecstatic that I've seen before include "Transported by joy" , "Really overjoyed, gleeful" , "Euphoric" , "Thrilled and overjoyed" , "in a trance" .)