Related Clues:

• Low singer
• Oodles of time
• Incredibly long time
• Proterozoic or Archeozoic, e.g.
• Period of many years
• Low pitch
• Fiddle type
• Extremely long time
• Cello's kin
• String of periods
• ... and another
• Very, very long time
• Waiting time at the motor vehicle bureau, seemingly
• Striped swimmer
• Considerable stretch