Related Clues:

• Information from tree rings
• Lose freshness
• The time of one's life?
• Nine-digit ID's
• Time in history
• Some ID's
• See 6-Down
• Get hoary
• What candles may signify
• See 36-Across
• Well-kept secret, for some
• Kind of group
• Tree rings indication
• See 48-Across
• Get on