Related Clues:

• Wisk alternative
• Geologi-cal time
• Chronology component, perhaps
• Span
• It's a big stretch
• Pitching number
• It should be low on a diamond
• Golden __
• Chunk of time
• Big Band or Disco period
• Alliance of nations
• The 80's, say
• ''Flapper'' follower
• Eventful time
• Victorian __