Related Clues:

• "__ upon a time ..."
• Fairy-tale first word
• Thrice third
• It might be enough
• Story opener
• In the very old days
• ''For ___ in My Life'' (Stevie Wonder)
• It's enough, in an expression
• Historically
• Twice from thrice
• Tale beginning?
• One less than twice
• First word of 'Shrek'
• First word of a fairy tale
• "___ Upon a Mattress"