Related Clues:

• See 6-Down
• Mesozoic or Paleozoic
• Lots of time
• Get hoary
• Interminable time
• Victorian ___
• What candles may signify
• See 36-Across
• A long time
• Depression ___
• See 35-Across
• Pitcher's stat
• Prohibition ___
• Well-kept secret, for some
• Eocene, for one