Possible Clues:

• Macabre
• Morbidly interested in death or disaster
• Irish lough without its source river turned unwholesome
• Describes a spirit at Halloween in Lough Mask taking head off trout
• Uncontrollable oil gush — hot and revolting
• Morbid, horrible
• Gruesome
• Revolting actress once taken round house by university lecturer
• Like many Chas Addams characters