Cass & Taryn's Cryptic Crossword No. 2

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Across
  1. 3. A good cough gets things done. (10)
  2. 5. Era when pigs fly. (6)
  3. 9. Don’t be so lar-dee-dah about renewables. (5)
  4. 10. Went deep to find a bird. (4)
  5. 12. then leave a mess. (4, 5)
  6. 14. Even going backwards you get high. (3)
  7. 17. ego This priest is sometimes arrogant. (5,3)
  8. 18. Fruits that stay on the ground. (5)
  9. 20. first, then polar opposites. (5,3,6)
  10. 21. (13)
  11. 23. Cabs crash then cover up the accident. (4)
  12. 25. Spreading rumours despite being a well-
  13. 28. marks Kids get upset about school
  14. 29. Striking instruments again will have
  15. 31. and cheese Cheech and Chong are similar
  16. 33. (12)
  17. 34. Royalty touches down in a good state. (10)
  18. 36. (5,4)
Down
  1. 1. Comfortably and surreptitiously walks past (8)
  2. 2. Two ladies flavour the roast. (8)
  3. 4. is special A paradox about equality and
  4. 6. bird. (10)
  5. 7. wax Buy it in Rio, but it’s not for
  6. 8. I can’t stand running competitions. (6)
  7. 11. (9,3)
  8. 13. A messy Argentinian (10)
  9. 15. ring A smelly engagement (6,4)
  10. 16. A negative deduction creates a massive blaze. (7)
  11. 19. (8,2,7)
  12. 22. juice Get ready to stop before a sweet drink. (6,5)
  13. 23. A fabulous way to save for retirement. (5)
  14. 24. toes Cate’s mole creates terrible fashion
  15. 25. Two dog feet make a nice ointment (6)
  16. 26. It looks funny but is actually a form of
  17. 27. A succulent ending. (6)
  18. 30. It’s brown and round and underground. (4)
  19. 32. Snake skin found in an outdoor building. (4)
  20. 35. Can make a big splash in a small room. (3)