European name attached to everyone in court (7)
I believe the answer is:
walloon
'european' is the definition.
(people from Wallonia in Belgium)
'name attached to everyone in court' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'attached to' means one lot of letters go next to another.
'everyone' becomes 'all' (all people).
'in' means one lot of letters goes inside another.
'court' becomes 'woo' (both can mean to romance someone).
'all' going into 'woo' is 'walloo'.
'n' put after 'walloo' is 'WALLOON'.
(Other definitions for walloon that I've seen before include "Southern Belgian" , "Francophone" , "Native of S Belgium or N France area" , "Belgian dialect" , "French-speaking Belgian" .)