Crackpot Weekly #1

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Across
  1. 1. Large marsupial.
  2. 3. Advertising revenue tycoon.
  3. 5. One of the good guys?
  4. 7. Never makes sense?
  5. 9. Sells used jallopies.
  6. 12. From the future.
  7. 13. Annoyingly hard to type. And annoying.
Down
  1. 2. Just chillin'
  2. 4. Heard of this lady?
  3. 6. Not a circle. Not sane.
  4. 8. A pearl amongst oysters.
  5. 10. Crackpot inventor.
  6. 11. Retired Crackpot.