What does the cryptic crossword clue "He succeeds becoming hornier – it's fantastic! (9)" mean?

The definition is "He succeeds". The wordplay uses an anagram. anagram of HORNIER IT = INHERITOR; definition: "He succeeds" The answer is INHERITOR.

He succeeds becoming hornier – it's fantastic! (9)

Guardian Cryptic #29209 | 14 Across | 2023-10-24 flower