A monster novel (12)
I believe the answer is:
frankenstein
This clue could be a double definition.
'a monster' is the first definition.
(thesaurus)
'novel' is the second definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for frankenstein that I've seen before include "disastrous inventor" , "Animator" , "Mary Shelley's monster-making baron" , "Monster's creator" , "Monster creator (M. Shelley)" .)