Related Clues:

• Grimm beginning
• Old
• See 6-Down
• Enough, for some
• ___ in a blue moon
• First word in a fairy tale
• On a single occasion
• Heretofore
• '___ bitten, twice shy'
• Have ___ at
• 'Going ___, going...'
• Days of old
• In olden times
• Times past
• 'It's ___!' (thumbs-up reply)