Novel: not all allow it to be distributed (6)
I believe the answer is:
lolita
'novel' is the definition.
(I've seen this before)
'not all allow it to be distributed' is the wordplay.
'not all' means to remove the last letter (not all of the word).
'to be distributed' is an anagram indicator.
'allow' with its last letter taken off is 'allo'.
'allo'+'it'='alloit'
'alloit' with letters rearranged gives 'LOLITA'.
(Other definitions for lolita that I've seen before include "Nabokov novel about a nymphet" , "Nabokov's nymphet" , "novel title" , "Precocious Nabokov heroine" , "1958 novel by Vladimir Nabokov" .)