Related Clues:

• In the __ (long ago)
• Prior
• Ago
• Tense choice?
• It may be shady
• Bygone days
• Time traveler's destination, perhaps
• Proust's "Remembrance of Things __"
• Onetime
• Word with due or participle
• What's done is this
• Tense period?
• Word used in telling time
• Ex-
• Over and done