Possible Clues:

• "It just came back to me"
• "Ah, yes, of course ..."
• Song from Stephen Sondheim's musical 'Evening Primrose'
• 'Time was . . .'
• 'There was a time...'
• 'There was the time ...'
• ''It's coming back to me''
• Coming-back words
• 'You don't need to remind me'
• 'Time was ...'