Shaking doubt about Bible (7)
I believe the answer is:
quavery
'shaking' is the definition.
(thesaurus)
'doubt about bible' is the wordplay.
'doubt' becomes 'query' (a query is a doubt or question).
'about' means one lot of letters goes inside another.
'bible' becomes 'AV' (Authorised Version of the Bible).
'query' placed around 'av' is 'QUAVERY'.
(Other definitions for quavery that I've seen before include "Apt to tremble" , "trembling" .)