A cat gets cross with him (3)

I believe the answer is:

man

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'a cat' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

(Other definitions for man that I've seen before include "just one" , "Irish Sea isle" , "Isle of -; chess piece" , "Dude" , "Staff the island" .)

I've seen this clue in the Evening Standard.

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