Related Clues:

• At the moment when
• Start of a tale
• "For ___ in My Life" (Stevie Wonder)
• Not repeatedly
• Quondam
• First word of "The Raven"
• Not currently
• "Going ___, going . . ."
• For ___ (on this occasion)
• In the distant past
• Single time
• Story start
• Fairy-tale opener
• A while ago
• Years back