Cross about ultimately bitter Bible parody (8)
I believe the answer is:
travesty
'parody' is the definition.
(synonyms)
'cross about ultimately bitter bible' is the wordplay.
'cross' becomes 'testy' (I've seen this in another clue).
'about' indicates putting letters inside.
'ultimately' says to take the final letters.
'bible' becomes 'av' (Authorised Version of the Bible).
The final letter of 'bitter' is 'r'.
'r'+'av'='rav'
'testy' going around 'rav' is 'TRAVESTY'.
(Other definitions for travesty that I've seen before include "Make fun of" , "Take off" , "Absurd misrepresentation" , "pantomime" , "Grotesque misrepresentation" .)