Check a dazzling display in ceremonial carriage (7)
I believe the answer is:
chariot
'ceremonial carriage' is the definition.
(I've seen this before)
'check a dazzling display' is the wordplay.
'check' becomes 'ch' (I've seen this in other clues).
'dazzling display' becomes 'riot'.
'ch'+'a'+'riot'='CHARIOT'
'in' acts as a link.
(Other definitions for chariot that I've seen before include "Two-wheeled horse-drawn vehicle in ancient Rome" , "ceremonial carriage" , "Horse-drawn racing vehicle; oat rich (anag.)" , "Stately vehicle" , "Old vehicle (of fire?)" .)