They transmit information and ensure no confusion (8)

I believe the answer is:

neurones

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'they transmit information' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'and ensure no confusion' is the wordplay.
'and' becomes 'n' (common abbreviation for 'and').
'no' becomes 'O' (resembles 0 - 'no' can mean 'zero').
'confusion' indicates an anagram.
'ensure'+'o'='ensureo'
'ensureo' is an anagram of 'eurones'.
'n'+'eurones'='NEURONES'

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I've seen this clue in The Irish Times.

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