Race journalist broadcast (7)
I believe the answer is:
relayed
'broadcast' is the definition.
(I've seen this before)
'race journalist' is the wordplay.
'race' becomes 'relay' (relay race).
'journalist' becomes 'ed' (short for editor).
'relay'+'ed'='RELAYED'
(Other definitions for relayed that I've seen before include "Transmitted along" , "Broadcast; passed on" , "Passed along" , "Received and passed on" , "Layered (anag.)" .)