Possible Clues:

• See 8
• Half of 7 Across
• Star count on the U.S. flag
• 46-Across, with respect to this answer's location
• Starts to face it — for the young this is ancient
• Number of letters in Post Office by five
• Bill that features Grant's portrait
• Iffy criminal hides last of the loot for number of the stars in America?
• With 39- and 40-Across, length of 60-Across' record hitting streak
• Iffy novel about debasement ultimately, fiend from hell shackling female in vacuous story?