Possible Clues:

• Find someone to play the scoundrel, old singer
• Male singer operated on before puberty to retain his soprano voice
• Male singer for whom the Italians used to go nuts
• Performers tell nothing to deprived performer
• Surgically-treated male soprano (hist.)
• Group on stage supported by muse initially failing singer
• Voice thrown by wretch with nothing!
• Post-op, his number was up!
• Censor calls in questionable star singer - he's missing something
• Players betray old one singing higher than most