Related Clues:

• Rule of thumb
• Statistical measure
• "Cheers" barfly
• Usual
• "Cheers" regular
• Testing standard
• 'Cheers' habitué
• Name for an average guy?
• It's not out of the ordinary
• 100, IQ-wise (with ''the'')
• Bethune, to his friends
• Cliff's sidekick on "Cheers"
• PAR
• Cliff's "Cheers" cohort
• ''Cheers'' regular