Collect two articles in Greece (6)
I believe the answer is:
gather
'collect' is the definition.
('gather' can be a synonym of 'collect')
'two articles in greece' is the wordplay.
'two articles' becomes 'athe' (article meaning part of speech: the, a etc.).
'in' is an insertion indicator.
'greece' becomes 'gr' (abbreviation).
'athe' put inside 'gr' is 'GATHER'.
(Other definitions for gather that I've seen before include "Bring or assemble together" , "put in pleats" , "The rag (anag.)" , "make a deduction" , "From information given, learn" .)