New co-writer upset old news reporter (4,5)
I believe the answer is:
town crier
'old news reporter' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'new co-writer upset' is the wordplay.
'new' becomes 'n' (abbreviation as in New Testament NT).
'upset' indicates an anagram.
'n'+'co'+'writer'='ncowriter'
'ncowriter' with letters rearranged gives 'TOWN-CRIER'.
Can you help me to learn more?
(Other definitions for town crier that I've seen before include "Announcer" , "Bellman" , "old teller" , "'The person who used to make public announcements in the streets (4,5)'" , "Newsreader" .)