Devalue revolutionary article and writer (7)
I believe the answer is:
cheapen
'devalue' is the definition.
(I've seen this before)
'revolutionary article and writer' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'article' becomes 'a' (the indefinite article in English).
'and' is a charade indicator (letters next to each other).
'writer' becomes 'pen' (I've seen this before).
'che'+'a'+'pen'='CHEAPEN'
(Other definitions for cheapen that I've seen before include "Decry or devalue" , "Reduce worth, degrade" , "Debase" , "discount" , "Demean - make less expensive" .)