Leader avoids rabble-rousing book (7)
I believe the answer is:
edition
'book' is the definition.
'leader avoids rabble-rousing' is the wordplay.
'leader avoids' means to remove the first letter (I've seen 'leader avoiding' mean this).
'rabble-rousing' becomes 'sedition' (both can mean encouraging rebellion).
'sedition' with its initial letter taken off is 'EDITION'.
(Other definitions for edition that I've seen before include "Version of a publication" , "Something impressed" , "single programme" , "Particular version of a published text" , "I don tie (anag.)" .)