Wikipedia Signpost V

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Across
  1. 4. French v. Berber
  2. 5. Thickened with okra, filé, or roux
  3. 7. Horse with a budget airline named in his honor
  4. 8. Can be spiral, elliptical, or irregular
  5. 10. Capital of Sikkim
  6. 11. Brassica of kraut and cole
  7. 12. From Stoker to Meyer
  8. 15. Let us cultivate our gardens
  9. 16. Born Thelma Ryan
  10. 17. DJ, turn it up, mate!
Down
  1. 1. Nippon
  2. 2. Welsh fortified river crossing
  3. 3. Chinese polymath of the Han dynasty
  4. 6. They can open doors!
  5. 9. Wife of Gautama Mahairishi
  6. 13. Her symbol is a mirror
  7. 14. Two cues, one baize
  8. 17. Luminous spheroid of plasma