Snippets from books by author delving into probability (8)
I believe the answer is:
oddments
'snippets' is the definition.
'books by author delving into probability' is the wordplay.
'books' becomes 'nt' (New Testament).
'by' means one lot of letters go next to another.
'author' becomes 'me' (the author of the crossword).
'delving into' indicates putting letters inside.
'probability' becomes 'odds' (I've seen this before).
'nt' put after 'me' is 'ment'.
'ment' put inside 'odds' is 'ODDMENTS'.
'from' acts as a link.
(Other definitions for oddments that I've seen before include "Motley assortment of things" , "Assorted leftovers" , "Bits and pieces, isolated garments" , "Bits and bobs" , "just a few items" .)