Narrative books by editor possessing special aptitude (8)
I believe the answer is:
talented
'possessing special aptitude' is the definition.
(I've seen this in another clue)
'narrative books by editor' is the wordplay.
'narrative' becomes 'tale' (synonyms).
'books' becomes 'NT' (New Testament).
'by' says to put letters next to each other.
'editor' becomes 'ed' (abbreviation).
'tale'+'nt'+'ed'='TALENTED'
(Other definitions for talented that I've seen before include "Having special aptitude" , "Having natural or special ability" , "Having an unusual amount of ability" , "Having special or great ability" , "Skilful" .)