Brilliance of recital, cellist making a comeback (5)
I believe the answer is:
eclat
'brilliance' is the definition.
(eclat means brilliance or flair)
'of recital cellist making a comeback' is the wordplay.
'of' indicates a hidden word.
'making a comeback' says the letters should be written in reverse.
'talce' is hidden within 'recital cellist'.
'talce' backwards is 'ECLAT'.
(Other definitions for eclat that I've seen before include "Showy effect (Fr.)" , "Splash" , "great success" , "Enthusiastic approval" , "French social distinction or success" .)