The most common and most likely answer to this crossword clue is the 9 letter word CYBERPUNK
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The straight part
We know that "science fiction genre" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case science fiction genre = cyberpunk.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CYBERPUNK mean?
CYBERPUNK noun- A subgenre of science fiction which focuses on computer or information technology and virtual reality juxtaposed with a degree of breakdown or radical change in the social order.
- A cyberpunk character, a hacker punk, a high-tech low life.
- A writer of cyberpunk fiction.
- A musical genre related to the punk movement that makes use of electronic sounds such as synthesizers.