RIGOROUS

Painstakingly accurate (8)

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

• Quick crossword No 15,427 — 2019-10-16 23:00:36
  10D: Leaving no stone unturned (8)
• Quick crossword No 15,275 — 2019-04-22 23:00:37
  19A: Painstakingly accurate (8)