Related Clues:

• Mesozoic or Paleozoic
• Lots of time
• Interminable time
• Victorian ___
• See 36-Across
• A long time
• Depression ___
• See 35-Across
• Pitcher's stat
• Prohibition ___
• Eocene, for one
• Washday brand
• A billion years
• Big Band ___
• Time piece?