Related Clues:

• Its square root is itself
• 4/4
• "The loneliest number," in a 1969 hit
• Brando's ''The Wild ___''
• 'That ___'
• Penultimate countdown word, often
• Solid yellow billiard ball
• Low end of many scales
• ''By the time I count to three'' follower
• Area code preceder for some
• Unspecified person
• 'The loneliest number,' in a Three Dog Night song
• Last ___
• 'This round's ___'
• Lunchtime, for some