Gift story books (6)
I believe the answer is:
talent
'gift' is the definition.
(I know that gift can be written as talent)
'story books' is the wordplay.
'story' becomes 'tale' (synonyms).
'books' becomes 'NT' (abbreviation for New Testament).
'tale'+'nt'='TALENT'
(Other definitions for talent that I've seen before include "Innate ability or Biblical money unit" , "Special or very great ability" , "gift > of Attic gold" , "that some scouts try to find" , "Genius" .)