Related Clues:

• Croon
• "__ Makes the World Go 'Round"
• Apple pie seasoning
• Nil to Navratilova
• Common sign-off
• Birds do it
• Sphere of Venus
• Troubadour topic
• No score
• Kind of nest or knot
• Do numbers
• Topic of many songs
• Perform in an opera
• Main squeeze
• It is 'resistless in battle,' wrote Sophocles