Unkindly say book without introduction's in need of rewrite (9)
I believe the answer is:
illegible
'in need of rewrite' is the definition.
I can't tell whether this defines the answer.
'unkindly say book without introduction's' is the wordplay.
'unkindly' becomes 'ill' (I've seen this in another clue).
'say' becomes 'eg' (both can mean 'for example').
'book' becomes 'bible' (bible is a kind of book).
'without introduction' means to remove the first letter.
'bible' with its initial letter taken away is 'ible'.
'ill'+'eg'+'ible'='ILLEGIBLE'
Can you help me to learn more?
(Other definitions for illegible that I've seen before include "Hard to read" , "Impossible to read" , "Not easily read" , "Unreadable" , "Not capable of being read" .)