Confused chap coy on discord of sounds (9)

I believe the answer is:

cacophony

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

'discord of sounds' is the definition.
'cacophony' can be an answer for 'discord' (thesaurus). I'm unsure of the 'of sounds' bit.

'confused chap coy on' is the wordplay.
'confused' indicates an anagram.
'chap'+'coy'+'on'='chapcoyon'
'chapcoyon' anagrammed gives 'CACOPHONY'.

Can you help me to learn more?

(Other definitions for cacophony that I've seen before include "Terrible row" , "Caterwauling" , "Clamour" , "Loud discordant sounds" , "Discordant mixture of sounds" .)

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

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