Related Clues:

• As good as it gets
• Got on in years
• Got gray
• See 21-Down
• Like wine
• Matured, as wine
• Ripened
• Like mellower wines
• Like a good egg
• Top-of-the-line
• Seasoned
• Like some cheeses
• Made cheddar better
• Matured, like wine
• Like balsamic vinegar