EITHER

One or the other (6)

Solution has appeared in 3 crosswords (1 across and 2 down):

• Quick crossword No 15,818 — 2021-01-18 00:00:14
  3D: Each of two (6)
• Quick crossword No 15,505 — 2020-01-17 00:00:46
  4D: (Of two) no matter which (6)
• Quick crossword No 15,266 — 2019-04-11 23:00:36
  11A: One or the other (6)