Crown of gold on European in court (7)
I believe the answer is:
coronet
'crown' is the definition.
(I know that coronet is a type of crown)
'gold on european in court' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'european' becomes 'e' (abbreviation e.g. EU).
'in' is an insertion indicator.
'court' becomes 'ct' (abbreviation used in road names).
'or'+'on'+'e'='orone'
'orone' placed within 'ct' is 'CORONET'.
'of' is the link.
(Other definitions for coronet that I've seen before include "Peer's headgear" , "topping item of jewellery" , "Sub-lieutenant" , "Jewelled circlet for the head" , "sign of rank" .)