Getting on with a good journalist (4)
I believe the answer is:
aged
'getting on' is the definition.
(getting on can mean getting older)
'with a good journalist' is the wordplay.
'with' is a charade indicator (letters next to each other).
'good' becomes 'g' (abbreviation).
'journalist' becomes 'ed' (short for editor).
'a' next to 'g' is 'ag'.
'ag'+'ed'='AGED'
(Other definitions for aged that I've seen before include "Grew older" , "Became older" , "Advanced in years" , "Senior" , "Senescent" .)