Independent politician innocent with European deadlock (7)
I believe the answer is:
impasse
'deadlock' is the definition.
(I know that deadlock can be written as impasse)
'independent politician innocent with european' is the wordplay.
'independent' becomes 'i'.
'politician' becomes 'MP' (Member of Parliament).
'innocent' becomes 'ass' (ass can mean a foolish or naive person).
'with' says to put letters next to each other.
'european' becomes 'E' (abbreviation e.g. EU).
'i'+'mp'+'ass'+'e'='IMPASSE'
(Other definitions for impasse that I've seen before include "'Deadlock, no progress can be made (7)'" , "nothing can be done" , "Stand-off, stalemate" , "Stalemate situation" , "cul-de-sac" .)