Silly goon excluded from moving agony column's hatchet job (7)

I believe the answer is:

calumny

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'hatchet job' is the definition.
('calumny' can be a synonym of 'hatchet job')

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for calumny that I've seen before include "Untrue and malicious statement about a person" , "Slander, defamation" , "Abuse" , "False accusation or statement" , "A slanderous statement" .)

I've seen this clue in The Telegraph.

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