Crossbones and Crosswords

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Across
  1. 2. Halloween currency
  2. 3. Night music that echoes
  3. 4. Ghostly conference call
  4. 7. Celtic festival marking the end of harvest that inspired Halloween
  5. 8. Spirited socializing
  6. 9. Witches bubbling pot
Down
  1. 1. Bribery with a threat
  2. 5. Fancy word for ghost
  3. 6. Darkly humorous or gruesome