Related Clues:

• Eon segments
• It's a long time
• Biographical data
• Sage (anag)
• Prolonged periods
• A rather long time
• Very long period
• Immense time span
• Mellows with time
• Length of a boring class, so it seems
• Refines wine
• A long time (informal)
• Christmas almost set up in plenty of time
• Carries on losing head for a long time
• Attendants lacking power for a very long time