Wordy novel about society makes you sleepy (6)
I believe the answer is:
drowsy
'sleepy' is the definition.
(I've seen this before)
'wordy novel about society' is the wordplay.
'novel' indicates anagramming the letters (letters in a new or novel order).
'about' is an insertion indicator.
'society' becomes 's' (common abbreviation in names of organisations).
'wordy' is an anagram of 'drowy'.
'drowy' placed around 's' is 'DROWSY'.
'makes you' acts as a link.
(Other definitions for drowsy that I've seen before include "Dropping off" , "Wanting to nod off" , "Nodding off" , "Half asleep" , "Not being very alert" .)