PROTOCOL

Correct procedure (8)

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

• Quick crossword No 15,888 — 2021-04-08 23:00:26
  20A: Formal etiquette (8)
• Quick crossword No 15,252 — 2019-03-27 00:00:38
  12A: Correct procedure (8)