Sound of icons breaking (5)

I believe the answer is:

sonic

I'm a little stuck... Click here to teach me more about this clue!

'sound' is the definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?

'icons breaking' is the wordplay.
'breaking' indicates an anagram.
'icons' anagrammed gives 'SONIC'.

'of' is the link.

Can you help me to learn more?

(Other definitions for sonic that I've seen before include "Boom of jet aircraft" , "Type of boom" , "seven hundred and forty three mph!" , "Like mine, possibly" , "Producing sound" .)

I've seen this clue in The Globe and Mail.

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