Writer's hell nursing broken neck (7)
I believe the answer is:
dickens
'writer's' is the definition.
(Charles Dickens)
'hell nursing broken neck' is the wordplay.
'hell' becomes 'dis' (term for the underworld in Greek myth).
'nursing' is an insertion indicator.
'broken' indicates anagramming the letters.
'neck' with letters rearranged gives 'cken'.
'dis' enclosing 'cken' is 'DICKENS'.
(Other definitions for dickens that I've seen before include "Charles --, British author" , "Barnaby Rudge author" , "writer" , "Author of Our Mutual Friend, d. 1870" , "Devil of a novelist!" .)