Journalist has man revealed (7)
I believe the answer is:
evinced
'revealed' is the definition.
(I've seen this before)
'journalist has man' is the wordplay.
'journalist' becomes 'ed' (short for editor).
'has' means one lot of letters goes inside another.
'man' becomes 'vince' ().
'ed' placed around 'vince' is 'EVINCED'.
(Other definitions for evinced that I've seen before include "Demonstrated" , "revealed" , "Made evident" , "Clearly showed" , "On display" .)