Execrable as to curio redistribution (9)

I believe the answer is:

atrocious

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'execrable' is the definition.
(I've seen this in another clue)

'as to curio redistribution' is the wordplay.
'as to curio' can be anagrammed to 'ATROCIOUS'.
However, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for atrocious that I've seen before include "Shocking" , "Extremely wicked" , "Dreadful" , "Appallingly bad" , "Awful" .)

I've seen this clue in the Sydney Morning Herald.

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