Crossword Genius

Highballs in much disarray? Don’t change a thing! (4,5)

Ross

I believe the answer is:

chin music

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'highballs in much disarray? don't change a thing' is the definition.
I can't tell whether this defines the answer.

'in much disarray? don't change a thing' is the wordplay.
'disarray?' indicates an anagram (I've seen 'disarray' mean this).
'don't change a thing' becomes 'sic' (I can't explain this - if you can you should believe this answer much more).
'in'+'much'='inmuch'
'inmuch' anagrammed gives 'chinmu'.
'chinmu'+'sic'='CHIN MUSIC'

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