UNIQUE

Unlike anything else (6)

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

• Quick crossword No 15,852 — 2021-02-26 00:00:00
  4D: Singular (6)
• Quick crossword No 15,744 — 2020-10-21 23:00:09
  15A: One and only (6)
• Quick crossword No 15,356 — 2019-07-25 23:00:12
  2D: Unlike anything else (6)