Deplore unconvincing Bible books (6)
I believe the answer is:
lament
'deplore' is the definition.
(I know that deplore can be written as lament)
'unconvincing bible books' is the wordplay.
I cannot quite understand how this works, but
'unconvincing' could be 'lame' (I've seen this in other clues) and 'lame' is located in the answer.
'bible' could be 'nt' (short for New Testament) and 'nt' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lament that I've seen before include "Expression of grief" , "complaint" , "Mental (anag)" , "Mourn (a person's death)" , "Song expressing grief" .)