Trick or Treat Your Brain

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Across
  1. 4. Masked killer who first appeared in John Carpenter's 1978 horror film (7,5)
  2. 6. Stephen King's sinister clown who terrorises the town of Derry (9)
  3. 8. Mythical beast whose transformation is associated with a full moon (8)
  4. 9. Magical phrase that also titles a 1993 Disney film featuring three witches (5,5)
  5. 11. Ancient Egyptian burial figure often depicted wrapped in bandages (5)
  6. 12. Wooden container traditionally associated with vampires and burial (6)
  7. 13. Reanimated corpse often depicted with an appetite for human brains (6)
  8. 17. Halloween tradition where children exchange a familiar phrase for sweets (5,2,5)
  9. 18. Orange vegetable traditionally carved into a frightening face during October (7)
  10. 21. Straw-filled figure originally designed to protect crops from birds (9)
  11. 23. Nightmare-inducing villain famous for his striped jumper and bladed glove (6,7)
  12. 24. Disguise worn to become someone, or something, else for the evening (7)
  13. 25. Mischievous creature from folklore, often portrayed with pointed ears (6)
  14. 26. A restless spirit believed to remain among the living (5)
  15. 28. The surname of Mary Shelley's scientist who creates life from dead matter (12)
Down
  1. 1. Supernatural being frequently associated with possession and evil (5)
  2. 2. Final resting place that provides the setting for many ghost stories (9)
  3. 3. Mischievous supernatural character whose name must be spoken three times (11)
  4. 5. Familiar Halloween figure historically associated with broomsticks and cauldrons (5)
  5. 7. Illuminated carved vegetable whose name comes from an old Irish folk tale (4,1,7)
  6. 10. German-derived term for a noisy spirit believed to move objects (12)
  7. 14. Legendary creature said to avoid sunlight, garlic and religious symbols (7)
  8. 15. Large metal vessel traditionally associated with brewing magical potions (8)
  9. 16. Popular American term for the sugary rewards collected on Halloween (5)
  10. 19. 1996 slasher film featuring a masked killer known as Ghostface (6)
  11. 20. Bram Stoker's famous Transylvanian count, first appearing in an 1897 novel (7)
  12. 22. Traditional mode of transport for a certain magical Halloween character (10)
  13. 27. Describes a building supposedly occupied by supernatural spirits (7)
  14. 29. A collection of 206 bones that becomes a popular decoration in October (8)