Princess’s part in opera with revolutionary finale (7)
I believe the answer is:
ariadne
'princess's part' is the definition.
The definition suggests a singular noun which matches the answer.
'in opera with revolutionary finale' is the wordplay.
'in opera' becomes 'aria' (I've seen this before).
'with' means one lot of letters go next to another.
'revolutionary' says the letters should be written in reverse (letters revolve around).
'finale' becomes 'end' (the end of a story or show).
'end' back-to-front is 'dne'.
'aria'+'dne'='ARIADNE'
Can you help me to learn more?
(Other definitions for ariadne that I've seen before include "Successful at stringing lover along" , "daughter of Cretan king?" , "Straussian heroine" , "who helped her man with a clue" , "Aider of Theseus against the Minotaur" .)