Crossword Genius

Greeting cat, who's barking (6)

Ross

I believe the answer is:

wotcha

'greeting' is the definition.

'cat who's barking' is the wordplay.
'barking' indicates anagramming the letters (UK slang for mad).
'cat'+'who'='catwho'
'catwho' is an anagram of 'WOTCHA'.

(Other definitions for wotcha that I've seen before include "Opener" , "Hello!" .)

I've seen this clue in The Times.
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