Impression about article by journalists being downer (10)
I believe the answer is:
depressant
'being downer' is the definition.
(a downer is a depressant drug)
'impression about article by journalists' is the wordplay.
I cannot quite see how this works, but
'about' could be 're' (regarding) and 're' is found in the answer.
'article' could be 'an' (indefinite article) and 'an' is found in the answer.
This may be the basis of clue (or it may be nonsense).
(Other definitions for depressant that I've seen before include "Downer" , "reducing activity of vital functions" , "Lowering spirits" , "Drug reducing nervous activity" , "Sedative drug" .)