Superintendent Kerr: 'Folks, cow has run amok' (5,2,5)

I believe the answer is:

clerk of works

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'run amok' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'superintendent kerr folks cow' is the wordplay.
'kerr folks cow' anagrams to 'CLERK OF WORKS'.
But, I'm not sure how this is indicated.

'has' is the link.

Can you help me to learn more?

(Another definition for clerk of works that I've seen is " Building supervisor".)

I've seen this clue in The Everyman puzzle in The Observer.

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