Magnificent display (4)
I believe the answer is:
pomp
'magnificent display' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pomp that I've seen before include "Great ceremony" , "Ceremony and splendour" , "Splendid ceremonial" , "Stately display, goes with ceremony" , "Ostentation - vanity" .)