Related Clues:

• Sit in the cellar
• Many years
• See 55-Across
• Dark ___
• Beauty preceder?
• Epoch
• Questionnaire datum
• Long, long time
• Time of one's life
• One billion years, in geology
• Quite a while
• Sophomore and junior, e.g.
• Developmental period
• Many millennia
• Sensitive subject, often