Time of pageantry (3)
I believe the answer is:
age
'time' is the definition.
(an age is a period of time)
'of pageantry' is the wordplay.
'of' indicates the answer is hidden within the clue.
'AGE' is hidden within 'pageantry'.
(Other definitions for age that I've seen before include "Period of time" , "Years since birth" , "Era; grow old" , "Years lived so far" , "16/18 [INDUSTRIAL REVOLUTION]" .)