Timeless opera getting royal accolade (5)
I believe the answer is:
oscar
'accolade' is the definition.
(I know that Oscar is a type of accolade)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for oscar that I've seen before include "Film acting award" , "- - Peterson, pianist" , "Develop again" , "US film award" , "academy's prize" .)