Collected articles penned by Greek journalist (8)
I believe the answer is:
gathered
'collected' is the definition.
(I know that collected can be written as gathered)
'articles penned by greek journalist' is the wordplay.
'articles' becomes 'a the' ('a' and 'the', indefinite and definite articles).
'penned by' indicates putting letters inside (inserted letters are penned in).
'greek' becomes 'gr' (abbreviation for Greek).
'journalist' becomes 'ed' (short for editor).
'athe' put into 'gr' is 'gather'.
'gather'+'ed'='GATHERED'
(Other definitions for gathered that I've seen before include "Collected in one place and concluded" , "Gleaned" , "Collected or assembled together" , "Understood" , "The grade (anag.)" .)