European country finally bans cars (7)
I believe the answer is:
estates
'cars' is the definition.
(estate is a type of car)
'european country finally bans' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'country' becomes 'state' (synonyms).
'finally' indicates one should take the final letters.
The final letter of 'bans' is 's'.
'e'+'state'+'s'='ESTATES'
(Other definitions for estates that I've seen before include "residential areas" , "Demesnes" , "Large cars" , "Property?" , "People leave them" .)