Wikipedia Signpost IV

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Across
  1. 4. Winnipeg invaded by Nazis
  2. 6. "Say" what? A rorqual?
  3. 8. This one's a bust! A painted one!
  4. 9. Dieu et mon droit
  5. 11. Epstein-Barr, for instance
  6. 15. A real kit for virtual guns of the '90s
  7. 16. Yours truly, minus 811
  8. 18. A Dorking good estate!
  9. 20. A lofty even-toed ungulate
Down
  1. 1. Amtrak's zippy 70s stock
  2. 2. Home of Aston (not Martin)
  3. 3. Pharaoh of the Fifth Dynasty
  4. 5. The original punks
  5. 7. Bells, at least 23
  6. 10. The Greek (Esp.)
  7. 12. It blows from all directions
  8. 13. Four bases in a three-letter acronym
  9. 14. Second from the Sun
  10. 15. Easter Island deity in space
  11. 17. ABM replaced by Sentinel
  12. 19. Orion's foot