Satisfied with small section of book (8)
I believe the answer is:
contents
'section of book' is the definition.
(I know that contents is part of book)
'satisfied with small' is the wordplay.
'satisfied' becomes 'content' (similar in meaning).
'with' is a charade indicator (letters next to each other).
'small' becomes 's' (abbreviation - e.g. clothes size).
'content'+'s'='CONTENTS'
(Other definitions for contents that I've seen before include "constituents" , "List of what's included" , "Satisfies the list of chapters" , "Things inside" , "All that's contained" .)