LEVITY

Inappropriate lack of seriousness (6)

Solution has appeared in 2 crosswords (1 across and 1 down):

• Quick crossword No 16,580 — 2023-06-26 23:00:32
  2D: Frivolous behaviour (6)
• Quick crossword No 16,320 — 2022-08-26 23:00:12
  14A: Inappropriate lack of seriousness (6)