Fiendish fate? (3)
I believe the answer is:
end
'fate?' is the definition.
(thesaurus)
'fiendish' is the wordplay.
'END' is hidden within the letters.
However, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for end that I've seen before include "Termination" , "Fine" , "Time to break-up (3,2,4) - See 12" , "Finish; goal" , "border?" .)