Moving a book around disturbed a lion (9)
I believe the answer is:
emotional
'moving' is the definition.
(moving can mean very emotional)
'a book around disturbed a lion' is the wordplay.
'a book' becomes 'tome' (a tome is a book).
'around' says the letters should be written in reverse.
'disturbed' is an anagram indicator (the order of letters is disturbed).
'tome' backwards is 'emot'.
'a'+'lion'='alion'
'alion' with letters rearranged gives 'ional'.
'emot'+'ional'='EMOTIONAL'
(Other definitions for emotional that I've seen before include "tear-jerking" , "Showing strong feelings" , "Loving" , "Arousing strong feeling" , "gushing" .)