Related Clues:

• Supreme
• Perfection embodied
• Better than better
• Superlatively good
• Like a score of 10 for 10
• ''In an ___ world ...''
• "In an ___ world ..."
• Letter sign-off
• 'In an ___ world ...'
• Best achievable
• Second-to-none
• Like a 63 Across?
• Most helpful
• Informal letter signoff
• Model to follow