Possible Clues:

• Choral works, or a trio so arranged
• Musical works — alternatively a round included in others
• Some Handel works
• Works like ''Messiah''
• Love to catch informer around Brazilian city on Sabbath with songs for orchestras
• Musical works in which Hamlet's friend's first to go burying gold
• Musical compositions based on religious texts
• Many Handel works
• Musical works coming from speaker with single thus reversed
• Handel's 'Messiah' et al