Oddly chatty man (3)

I believe the answer is:

cat

'man' is the definition.
(thesaurus)

'oddly chatty' is the wordplay.
'oddly' indicates alternate letters.
The alternate letters of 'chatty' are 'CAT'.

(Other definitions for cat that I've seen before include "Animal - one with nine tails!" , "eg Leopard" , "Lash < jazz fan" , "See 21" , "Feline mammel" .)

I've seen this clue in The Independent.

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