Possible Clues:

• Wagner's minstrel
• Wagner opera
• Legendary German woman, briefly, that employer’s taken in
• Wagner opera about a 13th-century German minnesinger
• Wagner opera in three acts
• Unearths an extraordinary stage work
• Opera by Wagner
• 12's minstrel finds sixpence around his residence
• Unearths an odd name for Wagner's minstrel
• Legendary knight who visited Powell landmark novel