Mixture of scrap for all to see in books (6)
I believe the answer is:
ragout
'mixture' is the definition.
(thesaurus)
'scrap for all to see in books' is the wordplay.
'scrap' becomes 'rag' (I've seen this before).
'for all' becomes 'U' (Universal film certificate - suitable for all).
'to see in' is an insertion indicator.
'books' becomes 'OT' (Old Testament).
'u' inserted into 'ot' is 'out'.
'rag'+'out'='RAGOUT'
'of' acts as a link.
(Other definitions for ragout that I've seen before include "food ..." , "Highly-seasoned stew" , "Spicy dish" , "something spicy?" , "Seasoned dish of stewed meat and vegetables" .)