FLATOUT

At top speed (4,3)

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

• Quick crossword No 15,871 — 2021-03-20 00:00:10
  2D: Lying in a state of total exhaustion (4,3)
• Quick crossword No 15,520 — 2020-02-04 00:00:26
  1D: At top speed (4,3)