Newspaper writer on beer (8)
I believe the answer is:
reporter
'newspaper writer' is the definition.
(I've seen this before)
'on beer' is the wordplay.
'on' becomes 're' ('on' can be mean 'with reference to').
'beer' becomes 'porter' (I've seen this in other clues**).
're'+'porter'='REPORTER'
(Other definitions for reporter that I've seen before include "Journo" , "One gives us the news" , "Hack" , "One may get a story" , "Collector of news for media" .)