Zen, surprisingly, stopping cook's mad behaviour (6)
I believe the answer is:
frenzy
'mad behaviour' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'zen surprisingly stopping cook's' is the wordplay.
'surprisingly' is an anagram indicator (a surprising ordering of the letters).
'stopping' is an insertion indicator (inserted letters stop or plug a gap).
'cook' becomes 'fry' (frying is a type of cooking).
'zen' anagrammed gives 'enz'.
'enz' placed within 'fry' is 'FRENZY'.
Can you help me to learn more?
(Other definitions for frenzy that I've seen before include "Violent excitement or agitation" , "Delirium - fury" , "Uncontrolled excitement" , "Wildly excited state" , "Delirious excitement" .)