Related Clues:

• 21, for one
• Gray, say
• Résumé info
• Historic period
• Actuary's datum
• Grow up
• Chapter in history
• Cause of wrinkles
• It's used for ID in the U.S.
• Nine-digit ID
• Factor in life insurance premiums
• Word with teen or old
• Bio datum
• Timeline segment
• Very long time