Musical set in ancient Egypt (4)
I believe the answer is:
aida
'musical set in ancient egypt' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aida that I've seen before include "Egyptian opera by 11 Down" , "Verdi's opera set in ancient Egypt" , "she dies entombed" , "Covent Garden production?" , "Verdi opera" .)