Causing strong feelings in European grounds (7)
I believe the answer is:
emotive
'causing strong feelings' is the definition.
(I've seen this before)
'european grounds' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'grounds' becomes 'motive' (I've seen this in other clues).
'e'+'motive'='EMOTIVE'
'in' acts as a link.
(Other definitions for emotive that I've seen before include "Stimulating to feelings" , "Deeply felt" , "Move tie (anag)" , "Arousing strong feeling" , "Arousing intense feelings" .)