Writer removes cover of good book, that's fit to be devoured (6)
I believe the answer is:
edible
'devoured' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'writer removes cover of good book that's fit to' is the wordplay.
'writer' becomes 'ed' (I've seen this in other clues).
'removes cover of' indicates the central letters (I've seen 'removing covers' mean this (letters which cover the word are removed)).
'good book' becomes 'bible' (synonyms).
'that's fit to' becomes 'e' (I am not sure about this - if you are sure you should believe this answer much more).
The central letters of 'bible' are 'ibl'.
'ed'+'ibl'+'e'='EDIBLE'
'be' is the link.
Can you help me to learn more?
(Other definitions for edible that I've seen before include "Eatable" , "Like some mushrooms" , "Suitable for use as food" , "Esculent" , "Fit to be eaten" .)