Showed contempt very loudly in snide fashion (7)

I believe the answer is:

sniffed

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'showed contempt' is the definition.
The answer and definition can be both to do with perception as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?

'very loudly in snide fashion' is the wordplay.
'very loudly' becomes 'ff' (short for fortissimo, 'very loud' in music).
'in' is an insertion indicator.
'fashion' indicates anagramming the letters.
'snide' with letters rearranged gives 'snied'.
'ff' going inside 'snied' is 'SNIFFED'.

Can you help me to learn more?

(Another definition for sniffed that I've seen is " Inhaled audibly".)

I've seen this clue in the Evening Standard.

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