Writer in bed in the Home Counties (6)
I believe the answer is:
scribe
'writer' is the definition.
(scribe is a kind of writer)
'bed in the home counties' is the wordplay.
'bed' becomes 'crib' (I've seen this before).
'in the' indicates putting letters inside.
'home counties' becomes 'se'.
'crib' going into 'se' is 'SCRIBE'.
'in' acts as a link.
(Other definitions for scribe that I've seen before include "Write" , "Document copier (hist.)" , "Official writer" , "Former document copier" , "One copied documents before the invention of printing" .)