Possible Clues:

• A window into what follows 'Los', or what preceded 'Tis'
• '___ Ashes'
• 1996-97 best seller '___ Ashes'
• '___ Ashes' (McCourt best seller)
• Frank McCourt's '___ Ashes'
• Start of a Frank McCourt title
• "__ Ashes": McCourt bestseller
• McCourt book (with "Ashes")