Such pomposity is not a front (4)
I believe the answer is:
side
'such pomposity' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for side that I've seen before include "perspective" , "Neighbourhood" , "Edge - aspect - team" , "Pomposity - bias - team" , "Competing players" .)