Related Clues:

• Impatient person's wait, seemingly
• Lengthy interval
• Basically forever
• Notable time span
• Geologic time span
• He tangles with cop — that will mean time
• Huge time span
• Long division?
• Vast stretch
• Several ages, in geology
• Plenty of time?
• Historical era
• Many, many centuries
• Nearly forever
• Long geologic time division