Related Clues:

• Go speedily
• Five- or nine-digit number
• Move swiftly
• Jack squat
• A goose egg
• Squat
• Fasten, as a ski jacket
• Absolutely nothing
• Address ending, informally
• Mail aid
• The White House's is 20500
• Go with haste
• Five-digit postal number, informally
• ___ + 4
• Do (up), as a fly