Possible Clues:

• Kevin Bacon degree count
• Number of US moon landings
• Number of bowls in a cricket over
• Many a first grader's age
• Kevin Bacon degree count?
• Small for nine, provided nine turns up
• Suppertime, for some
• Belgium, our # ____ trader
• Yard : three :: fathom : ___
• Number of Best Actress nominations for Deborah Kerr