Possible Clues:

• Monteverdi opera
• Gluck's '-- ed Euridice'
• Lover of Euridice, in a Monteverdi work
• Lover of Euridice, in a Gluck opera
• Gluck's '___ ed Euridice'
• '___ ed Euridice' (Gluck opera)
• Monteverdi title character
• Monteverdi opera character
• Gluck's ' ed Euridice'
• '-- ed Euridice' (Gluck opera)