Writer producing copy in south-east (6)
I believe the answer is:
scribe
'writer' is the definition.
(scribe is a kind of writer)
'copy in south-east' is the wordplay.
'copy' becomes 'crib' (crib can mean to copy from another source).
'in' is an insertion indicator.
'south east' becomes 'SE' (abbreviation).
'crib' placed inside 'se' is 'SCRIBE'.
'producing' is the link.
(Other definitions for scribe that I've seen before include "Hack - pen-pusher" , "Writer (before printing was developed)" , "Clerk, a public copyist" , "A writer of old" , "One copied documents before the invention of printing" .)