Article working for unknown author (4)
I believe the answer is:
anon
'unknown author' is the definition.
(I've seen this before)
'article working' is the wordplay.
'article' becomes 'an' (indefinite article).
'working' becomes 'on'.
'an'+'on'='ANON'
'for' acts as a link.
(Other definitions for anon that I've seen before include "Soon, precious stone" , "Not identified by name" , "Incognito (abbrev)" , "Mystery writer" , "Presently - unattributed" .)