SUBTLE

Far from obvious (6)

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

• Quick crossword No 16,055 — 2021-10-20 23:00:03
  13A: Able to make fine distinctions (6)
• Quick crossword No 15,776 — 2020-11-28 00:00:43
  19A: Far from obvious (6)