Crossword Genius

Chastisement: why? (4,3)

Ross

I believe the answer is:

what for

I believe this is a double definition.

'chastisement' is the first definition.
(thesaurus)

'why?' is the second definition.
(I've seen this before)

(Other definitions for what for that I've seen before include "Beating" , "reprimand?" , "Punishment that may be given" , "it's a question of purpose" .)

I've seen this clue in The Telegraph.
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