Crossword #549

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Across
  1. 2. A God of remover of obstacles and the offspring of Shiva
  2. 4. Group of words as part of a sentence (6)
  3. 6. Of a group of words
  4. 9. Crossword setter gets a couple of looks at extremely geeky study of words
  5. 11. 'Keep on loving ____'
  6. 12. generating a current in a conductor by placing it in a changing magnetic field
  7. 13. Flying mammal
  8. 15. A lot of words make a lot of bias in a side (8)
  9. 17. Likes to chase mice
  10. 18. what do you do at a green light
  11. 19. The second Pixar movie
  12. 23. 2nd derivative of displacement
  13. 24. Study of the derivation of words
  14. 25. the organ with a high pH
  15. 29. Man's best friend
  16. 31. Art of persuasive use of words
  17. 34. The S in NASA
  18. 35. Set of words used for decision of law court (8)
  19. 36. the total demand for all finished goods and services produced in an economy
  20. 38. a type of aurora
Down
  1. 1. Strings of words or periods of imprisonment (9)
  2. 3. War of words over base at end of aerodrome (6)
  3. 5. Has a trunk
  4. 7. Article concerning author of words of "Away in a Manger"? (4)
  5. 8. ____ Smith slapped Chris Rock
  6. 10. Suggestion of words being composed on behalf of the author (12)
  7. 14. Large marsupial
  8. 16. the integral of acceleration
  9. 20. dance
  10. 21. Of difference in meaning of words
  11. 22. Writer of words of song
  12. 26. homophone of two
  13. 27. Ungrammatical use of words - breach of good manners (8)
  14. 28. avec
  15. 30. 1st amendment case in 1969 to protest the Vietnam War
  16. 32. A satellite television with procedings of US federal government
  17. 33. An agent that plays in the shadows O_ _ n
  18. 37. Use of words conveying the sound of their meaning (12)