four letters

1234567891011121314151617181920
Across
  1. 2. Speed of walking or running
  2. 6. Hint or piece of evidence
  3. 7. Nocturnal flying insect
  4. 8. Solemn promise
  5. 11. Wise person or herb
  6. 13. Bird's home
  7. 15. Very small amount
  8. 17. Widespread reputation
  9. 18. Sudden shock or movement
  10. 20. Edge of a hat
Down
  1. 1. Witty remark
  2. 3. Succulent plant used in skincare
  3. 4. Sound reflection
  4. 5. Iron oxide, red-brown coating
  5. 9. Thin mist
  6. 10. Steady look
  7. 12. Toy flown in the wind
  8. 14. Rise and fall of the sea )
  9. 16. Small, pointed missile thrown by hand
  10. 19. To appear indistinctly