Extremely difficult (8)
I believe the answer is:
fiendish
(Other definitions for fiendish that I've seen before include "like some Sudokus" , "Terrible" , "Diabolic" , "Very difficult" , "Like Satan or the devil" .)
I believe the answer is:
fiendish
(Other definitions for fiendish that I've seen before include "like some Sudokus" , "Terrible" , "Diabolic" , "Very difficult" , "Like Satan or the devil" .)