THREE

Cardinal number (5)

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

• Quick crossword No 16,047 — 2021-10-11 23:00:02
  2D: Quorum for a crowd? (5)
• Quick crossword No 15,969 — 2021-07-12 23:00:27
  18D: Cardinal number (5)