Related Clues:

• Yellowing, maybe
• Like most whiskey
• Sommelier's datum
• __ beef
• Improved, perhaps
• Got grayer, perhaps
• Turned green, perhaps
• Grew older and wiser
• Got more mature
• Wine label datum
• Showing the years
• Matured, as cheese
• Expensive for being used, perhaps
• Allowed to improve, as cheeses
• Grew old