ROTOR

Revolving arm (5)

Solution has appeared in 4 crosswords (3 across and 1 down):

• Quick crossword No 16,530 — 2023-04-28 23:00:19
  9A: Mechanism that goes round and round (5)
• Quick crossword No 15,956 — 2021-06-27 23:00:37
  20A: Part of a device that goes round (5)
• Quick crossword No 15,629 — 2020-06-09 23:00:05
  11A: Helicopter lifter (5)
• Quick crossword No 15,423 — 2019-10-11 23:00:05
  18D: Revolving arm (5)