Former journalists get the train (7)
I believe the answer is:
express
'the train' is the definition.
(express is a kind of train)
'former journalists' is the wordplay.
'former' becomes 'ex'.
'journalists' becomes 'press' (I've seen this before).
'ex'+'press'='EXPRESS'
'get' is the link.
(Other definitions for express that I've seen before include "Specific; going at speed" , "Verbalise - very fast" , "Say; fast train" , "Fleet" , "Transport" .)