What does the cryptic crossword clue "Nonsense passes as expression of glee (4,5)" mean?

The wordplay uses a charade (building blocks). JAZZ (synonym="nonsense") + HANDS (synonym="passes") = JAZZHANDS The answer is JAZZHANDS.

Nonsense passes as expression of glee (4,5)

Guardian Cryptic #29235 | 7 Down | 2023-11-23 flower