Christie Crossword #4

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Across
  1. 3. An alliance (9)
  2. 8. River running through Manchester (6)
  3. 9. Medicine tablet/shape (7)
  4. 15. Big Ben's House (9,5)
  5. 16. Geometric crisps (7)
  6. 18. Protection for the patella (4,3)
  7. 19. Manchester Town Hall architecture (3-6)
  8. 20. Device - like a iPad (6)
Down
  1. 1. Type of vinegar (8)
  2. 2. Non-tabloid paper (10)
  3. 4. Halloween tradition (5,2,5)
  4. 5. Old-fashioned (7)
  5. 6. Journalist (8)
  6. 7. Add more details (5,3)
  7. 10. Humdrum (3,2,3,4)
  8. 11. Herb/a street in France (3)
  9. 12. Greek goddess of wisom (6)
  10. 13. Prejudice, partiality (4)
  11. 14. Comes from trees and dogs (4)
  12. 17. Guitar string clamp(4)