Revised journalist, revised diet (6)
I believe the answer is:
edited
'revised' is the definition.
(I've seen this before)
'journalist revised diet' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'revised' indicates an anagram.
'diet' is an anagram of 'ited'.
'ed'+'ited'='EDITED'
(Other definitions for edited that I've seen before include "garbled" , "Changed for going out" , "Corrected" , "Changed text" , "Amended" .)