Article about unidentified writer (4)

I believe the answer is:

anon

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'unidentified writer' is the definition.
'anon' can be an answer for 'writer' (I have seen 'Unknown writer' mean 'anon' so perhaps 'writer' could also mean 'anon'). I am unsure of the 'unidentified' bit.

'article about' is the wordplay.
'article' becomes 'an' (English indefinite article).
'about' becomes 'on' (as in a book 'on' a certain topic).
'an'+'on'='ANON'

Can you help me to learn more?

(Other definitions for anon that I've seen before include "At another time and with no identity, in short" , "Soon; unnamed" , "Soon, in a little while" , "In the near future" , "Immediately" .)

I've seen this clue in The Times.

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