Article appearing shortly (4)
I believe the answer is:
anon
'shortly' is the definition.
(I've seen this before)
'article appearing' is the wordplay.
'article' becomes 'an' (indefinite article).
'appearing' becomes 'on' (e.g. on stage or on television).
'an'+'on'='ANON'
(Other definitions for anon that I've seen before include "Soon; unattributed" , "Soon, precious stone" , "Presently - or unknown" , "Incognito (abbrev)" , "Without known author" .)