What does the cryptic crossword clue "Musical group turning up that may be in the groove (5)" mean?

The definition is "that may be in the groove". The wordplay uses a reversal. NONET (reversal="NONET") = TENON The answer is TENON.

Musical group turning up that may be in the groove (5)

Times Cryptic #28861 | 8 Down | 2024-03-11 flower