Related Clues:

• On one occasion
• "__ upon a time ..."
• Fairy-tale first word
• Thrice third
• It might be enough
• Story opener
• ''For ___ in My Life'' (Stevie Wonder)
• Special
• 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