Bar quiet during story by Republican newsman (9)
I believe the answer is:
publisher
'republican newsman' is the definition.
'publisher' can be an answer for 'newsman' (eg a newspaper publisher). I am not certain of the 'republican' bit.
'bar quiet during story by' is the wordplay.
'bar' becomes 'pub' (I've seen this in another clue).
'quiet' becomes 'sh' (both can be said to tell someone to be quiet).
'during' is an insertion indicator.
'story by' becomes 'lier' (I can't explain this - if you can you should give a lot more credence to this answer).
'sh' inserted within 'lier' is 'lisher'.
'pub'+'lisher'='PUBLISHER'
(Other definitions for publisher that I've seen before include "One utters volumes" , "Man with many titles" , "House of books" , "Issuer of books, music, etc" , "Eg Jonathan Cape or Hamish Hamilton" .)