NUMBERED

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Across
  1. 6. Mayor of New York City elected in November 2025 (6,7)
  2. 8. Host of US series "The Late Show" (7,7)
  3. 10. Millionaire who left his estate for good, born during Christmas (5)
  4. 11. Comic creation of Belgian artist Peyo (3,6)
Down
  1. 1. Island where sponges abound, you might imagine (7)
  2. 2. In a corner, Officer Edgar Mallory gives this order (2,2,4)
  3. 3. Website created by Jimmy Wales and Larry Sanger (9)
  4. 4. Morale of confused parasite losing AA membership (6)
  5. 5. Author of "A Short History of Nearly Everything" (4,6)
  6. 7. Seventh planet from the Sun (7)
  7. 9. Vessel and bovine, it's said, will smooth out the wrinkles (5)
  8. 12. Scattered sources identify Liverpudlian (7)