Alternate charge binding books (6)
I believe the answer is:
rotate
'alternate' is the definition.
(rotating is a kind of alternating)
'charge binding books' is the wordplay.
'charge' becomes 'rate' (rate is a kind of charge**).
'binding' means one lot of letters goes inside another.
'books' becomes 'ot' (Old Testament).
'rate' enclosing 'ot' is 'ROTATE'.
(Other definitions for rotate that I've seen before include "Make to spin around" , "Spin as on axle" , "Turn around on axis or central point" , "Go around" , "Turn around an axle, swivel" .)