Very tricky cryptic finished (8)
I believe the answer is:
fiendish
'very tricky' is the definition.
I can't tell whether this defines the answer.
'cryptic finished' is the wordplay.
'cryptic' indicates anagramming the letters (a cryptic or obscure order of the letters).
'finished' with letters rearranged gives 'FIENDISH'.
Can you help me to learn more?
(Other definitions for fiendish that I've seen before include "Diabolical" , "Very difficult" , "Terrible" , "Like Satan or the devil" , "Diabolic" .)