What does the cryptic crossword clue "No longer held fun rave with zero dancing (7)" mean?

The wordplay uses an anagram. anagram of FUN (synonym="FUN") + ZERO (synonym="ZERO") = UNFROZE The answer is UNFROZE.

No longer held fun rave with zero dancing (7)

Guardian Cryptic #29258 | 25 Across | 2023-12-20 flower