Related Clues:

• Rock climber's challenge
• Jumping-off point
• Vera's husband on ''Cheers''
• George of 'Cheers'
• Bell curve peak
• Regular at "Cheers"
• Mesa Verde feature
• "Cheers" character
• George who played Norm
• Test standard
• Typical amount
• Bluff
• What's expected
• Rule of thumb
• Statistical measure