To avoid disagreement, I had sounded confused (9)

I believe the answer is:

mystified

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'confused' is the definition.
('mystify' can be a synonym of 'confuse')

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(Other definitions for mystified that I've seen before include "Seriously puzzled" , "Perplexed" , "Utterly bewildered" , "Puzzled, really baffled" , "confused" .)

I've seen this clue in The Times.

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