One god imprisons Bible character (8)
I believe the answer is:
identity
'character' is the definition.
(I've seen this before)
'one god imprisons bible' is the wordplay.
'one' becomes 'I' (Roman numeral).
'god' becomes 'deity' (synonyms).
'imprisons' is an insertion indicator.
'bible' becomes 'nt'.
'deity' enclosing 'nt' is 'dentity'.
'i'+'dentity'='IDENTITY'
(Other definitions for identity that I've seen before include "it may precede crisis" , "Close similarity" , "Distinct personality of an individual" , "Specified name of description of tin deity" , "One's individuality" .)