Related Clues:

• What the number of birthday candles signifies
• Yours gets a yearly increase
• Go gray, say
• ---
• Cause of some lines
• Bronze, Copper or Iron
• 1000 or 2000, but not 0
• It can't go down
• Lease length, often
• Turn gray, say
• Chronology datum
• Auden's ''The ___ of Anxiety''
• Get mature
• Diary capacity
• Progress toward maximum drinkability