Judge consumes good books from exchange (6)
I believe the answer is:
rotate
'exchange' is the definition.
(thesaurus)
'judge consumes good books' is the wordplay.
'judge' becomes 'rate' (rating is a kind of judging**).
'consumes' means one lot of letters goes inside another.
'good books' becomes 'ot' (Old Testament).
'rate' placed around 'ot' is 'ROTATE'.
'from' acts as a link.
(Other definitions for rotate that I've seen before include "Spin as on axle" , "Go round and round" , "Gyrate" , "Revolve" , "Turn around an axle, swivel" .)