WARMUP

Preparatory exercising (4-2)

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

• Quick crossword No 16,380 — 2022-11-05 00:00:35
  15D: Run until the normal working temperature is reached (4,2)
• Quick crossword No 15,719 — 2020-09-22 23:00:09
  4A: Preparatory exercising (4-2)