Related Clues:

• Got grayer, perhaps
• Turned green, perhaps
• Grew older and wiser
• Got more mature
• Showing the years
• Matured, as cheese
• Allowed to improve, as cheeses
• Grew old
• Got ripe
• Became mellow
• Got some seasoning
• Grew older
• Like much wine and cheese
• Had time to mature
• Kept in a cellar, perhaps