Related Clues:

• Wimbledon's Centre Court, e.g.
• Do a medley, say
• Croon
• Apple pie seasoning
• Tennis surface, sometimes
• Birds do it
• Serenade
• Do numbers
• Perform in an opera
• Whitman's 'Leaves of __'
• Be a stool pigeon
• Common knee stain for kids
• Tell all, slangily
• Manet's ''Luncheon on the ___''
• Joint contents