What does the cryptic crossword clue "… hired gymnasium, showing stuff that's avant garde (4)" mean?

The definition is "avant garde". The wordplay uses a hidden word. Hidden in "… hirED GYmnasium, showing stuff that's avant garde" The answer is EDGY.

… hired gymnasium, showing stuff that's avant garde (4)

Guardian Cryptic #29082 | 12 Across | 2023-05-29 flower