Crossword Genius

After, newsman wrote on social media (6)

Ross

I believe the answer is:

posted

'wrote on social media' is the definition.
(eg made a Facebook post)

'after newsman' is the wordplay.
'after' becomes 'post' (prefix meaning after, eg post-war).
'newsman' becomes 'ed' (short for editor).
'post'+'ed'='POSTED'

(Another definition for posted that I've seen is " Mailed".)

I've seen this clue in The Times.
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