Cyptric.

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Across
  1. 1. A word's earlier basic form - note my rearrangement (6)
  2. 6. cattle spasm caused by motion (7)
  3. 7. radio communication has got an imperative - it takes two (3,2,5)
  4. 8. Prison may lead to frugality (9)
  5. 13. lawyers with soft hearts must fill the rounds (9)
  6. 15. measured 200 mg, say, of edible root (5)
Down
  1. 2. ignorant of fifty one in apparent surroundings (9)
  2. 3. Hurt man carries weapon (6)
  3. 4. illegitimate bark in an indic language (4,5)
  4. 5. dressing many a one is disorderly (10)
  5. 9. The one minding the child is easy to catch (6)
  6. 10. Couple of months ago, in London (7)
  7. 11. The rival seems in order. (7)
  8. 12. farmer rears a game bird (8)
  9. 14. a contemptible person ingests a shake (7)