Related Clues:

• Worth a 10, maybe
• A 10, by some standards
• Often unattainable perfection
• Best-possible
• Without a flaw
• Worth imitating
• The American dream, e.g.
• Theoretical, not concrete
• Just about perfect
• Model of excellance
• It's not concrete
• Model of excellence (5).
• Something that one hopes to attain
• Perfect for the purpose
• Sketchy summary of the main points