Related Clues:

• Standard of perfection
• High goal
• Unimprovable
• Meriting a ten
• Beyond improvement
• Rarely-met goal
• Worth a ten, maybe
• Beyond compare
• 10 out of 10, e.g.
• Chanson de ___ (medieval poem)
• Standard of excellence
• Absolutely perfect
•     Ultimate goal
• Perfectly suited
• ''Beau ___''