Fear head chopped off in mistake (5)
I believe the answer is:
error
This could be a double definition.
'fear head chopped off in' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'mistake' is the second definition.
(I know that mistake can be written as error)
Can you help me to learn more?
(Other definitions for error that I've seen before include "Slip, mistake" , "Bug" , "Mistake or mishap" , "Boob" , "wrong" .)