Possible Clues:

• Songlike, melodic
• Cyril playing song
• Addition to music player disco regularly used
• Song words
• Only Richard II (Quarto) includes this poem
• Melody line
• Tune's text
• Typically, Rice might pen this
• 'Raindrops on roses and whiskers on kittens,' e.g
• Unlikely riches will offer something to sing about? On the contrary