Sort of writer with spirit? (5)
I believe the answer is:
ghost
I believe this clue is a double definition.
'sort of writer' is the first definition.
'spirit?' is the second definition.
(spirit can mean a ghost)
'with' acts as a link.
(Other definitions for ghost that I've seen before include "Spectre, wraith" , "insubstantial presence" , "Apparition; faint trace" , "Write for another" , "who has a haunting act?" .)