HALFHEARTEDLY

In a lackadaisical fashion (4-9)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 15,923 — 2021-05-19 23:00:21
  21A: Without real enthusiasm (4-9)
• Quick crossword No 15,663 — 2020-07-19 23:00:02
  24A: In a lackadaisical fashion (4-9)