Crossword Genius

Appalled at having broken? (9)

Ross

I believe the answer is:

shattered

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'broken?' is the definition.
('shattered' can be similar in meaning to 'broken')

'appalled at' is the wordplay.
I cannot really see how this works, but
'at' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'having' acts as a link.

Can you help me to learn more?

(Other definitions for shattered that I've seen before include "Splintered" , "Broken into sharp pieces" , "Completely broken" , "devastated" , "bust" .)

I've seen this clue in the Evening Standard.
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