Crossword Genius

Train retired journalists (7)

Ross

I believe the answer is:

express

'train' is the definition.
(express train is a kind of train)

'retired journalists' is the wordplay.
'retired' becomes 'ex' (prefix meaning former or onetime).
'journalists' becomes 'press' (the press can mean the newspaper industry).
'ex'+'press'='EXPRESS'

(Other definitions for express that I've seen before include "Convey; particular; train" , "Speak - fast" , "set forth" , "air" , "Non-stop(ping)" .)

I've seen this clue in The Independent.
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