In European Court, six turn out (5)
I believe the answer is:
evict
'turn out' is the definition.
(I know that evict is a more specific form of the action the turn out)
'in european court six' is the wordplay.
'in' indicates putting letters inside.
'european' becomes 'e' (abbreviation e.g. EU).
'court' becomes 'ct' (abbreviation used in road names).
'six' becomes 'VI' (Roman numerals).
'e'+'ct'='ect'
'ect' going around 'vi' is 'EVICT'.
(Other definitions for evict that I've seen before include "Oust" , "Expel from home" , "Throw out (from home)" , "Remove form house for non-payment" , "Turn out of home" .)