Authors with another set of neat procedures? (8)

I believe the answer is:

cowrites

'authors with another' is the definition.
(cowrite can mean to write with another person)

'set of neat procedures?' is the wordplay.
I cannot really understand how this works, but
an anagram of 'set' is 'tes' which is located in the answer.
'of' could be 'o' and 'o' is located in the answer.
This explanation may well be incorrect...

I've seen this clue in The Times.

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