Cryptic crossword clue
Genre briefly returned in horrific series 7,7

The most common and most likely answer to this crossword clue is the 7 plus 7 letter word SCIENCE FICTION

I've seen this crossword clue in Independent
S
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Buddy explains!

The straight part
We know that "Genre" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case genre = science fiction.
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 SCIENCE FICTION mean?

SCIENCE FICTION noun
  1. Fiction in which advanced technology or science is a key element.
  2. Technology that, while theoretically possible, is not yet practical.

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