Disposed to stop Biblical killer, I see, and book's obsessive antihero (7,4)
I believe the answer is:
captain ahab
'book's obsessive antihero' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'disposed to stop biblical killer i see' is the wordplay.
'disposed' becomes 'apt' (synonyms).
'to stop' indicates putting letters inside (stopping can mean blocking a gap).
'biblical killer' becomes 'cain' (I've seen this before).
'i see' becomes 'ahab' (I can't justify this - if you can you should give a lot more credence to this answer).
'apt' inserted within 'cain' is 'captain'.
'captain'+'ahab'='CAPTAIN AHAB'
'and' is the link.
Can you help me to learn more?
(Other definitions for captain ahab that I've seen before include "Moby-Dick mariner" , "Vengeful sailor" , "Tyrannical whaler" , "Moby Dick's hunter" .)