Royal insignia (7)
I believe the answer is:
regalia
'royal insignia' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for regalia that I've seen before include "Array" , "Ceremonial trimmings of high office" , "Royal trappings" , "Badges of office" , "Emblems of royalty used at coronations" .)