Cooper's crossword

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Across
  1. 1. Freezing, cold
  2. 4. Administrator, hit
  3. 6. Ensemble, group
  4. 9. Gathering, performance
  5. 10. Pact, contract
  6. 12. Peacefulness, calmness
  7. 17. Opportune, suitable
  8. 20. Administrator, manager
Down
  1. 2. Temperature, weather
  2. 3. Environment, bushed
  3. 5. Clerk, administrator
  4. 7. Outstandingly, extraordinarily
  5. 8. Admit, obtain
  6. 11. Lexicon, vocabulary
  7. 13. Obtain, gain
  8. 14. Disagreement, argument
  9. 15. Commend, mention
  10. 16. Alcohol, whiskey
  11. 18. Free, community
  12. 19. Group, collection