Book's fan mail rough and ready (6,4)
I believe the answer is:
animal farm
'book's' is the definition.
(I've seen this before)
'fan mail rough and ready' is the wordplay.
'rough' is an anagram indicator (a rough or broken ordering of the letters).
'and' means one lot of letters go next to another.
'ready' becomes 'arm' (I've seen this in another clue).
'fan'+'mail'='fanmail'
'fanmail' is an anagram of 'animalf'.
'animalf'+'arm'='ANIMAL FARM'
(Other definitions for animal farm that I've seen before include "George Orwell novel" , "where Napoleon led" , "allegory" , "Book giving quote Four legs good, two legs bad" .)