It could also be 'Informal term for YA books'. Here, we're directly relating to the idea of 'ya fiction' and using an informal description to form the clue.
I think it could be 'YA NOVEL' as a common phrase related to young adult fiction.
It could be related to popular young adult fiction books or authors. Maybe names like J.K. Rowling or Suzanne Collins.
Some examples could be words related to YA fiction genres like 'fantasy' or 'dystopia'. Or perhaps names of YA fiction series like 'Divergent' or 'Twilight'.
YA fiction might show up in clues like 'Teen romance novel' or 'Young adult adventure story'.
Commonly, YA fiction in crossword clues could involve words related to school, friendships, or adventure. It could also hint at popular YA genres such as romance or mystery. Sometimes, it might be a clue about a specific YA character's name.
The Hunger Games series could be one. It's popular and often shows up in crosswords because of its wide recognition.
Common clues for a book of fiction in a crossword could be words like 'myth', 'legend', or 'tale'. Or it could be specific names of fictional creatures or places. Sometimes, the clue might be a description of a plot device used in fiction.
Common clues could be names of fictional characters, titles of novels or stories, or words related to fantasy or imagination.
It could be names of fictional characters, places from fantasy novels, or titles of made-up stories.
Some possible clues could be 'epic tale', 'lengthy narrative', or 'prolonged account'.