Show disapproval of most of the novel (3)
I believe the answer is:
boo
This could be a double definition.
'show disapproval of' is the first definition.
(as in a crowd booing)
'most of the novel' is the second definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for boo that I've seen before include "Exclamation of disapproval" , "causing surprise!" , "I'm unimpressed" , "Show displeasure orally" , "Shout in disgust" .)