What does the cryptic crossword clue "17/6 for Austen novel (9)" mean?

The wordplay uses an anagram. anagram of FORAUSTEN ("17/6 for Austen") [anagram: "novel"] = NOSFERATU The answer is NOSFERATU.

17/6 for Austen novel (9)

Guardian Cryptic #29640 | 19 Across | 2025-03-12 flower