Note: That man is with journalist (4)
I believe the answer is:
heed
'note' is the definition.
(I've seen this before)
'man is with journalist' is the wordplay.
'man' becomes 'he' (pronoun for a man).
'is with' means one lot of letters go next to another.
'journalist' becomes 'ed' (short for editor).
'he'+'ed'='HEED'
'that' acts as a link.
(Other definitions for heed that I've seen before include "Mark" , "Be mindful of" , "Take note of" , "Consider" , "Care, attention (paid)" .)