TOUGHIE

Difficult problem (7)

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

• Quick crossword No 16,396 — 2022-11-24 00:00:12
  15D: A difficult one to crack? (7)
• Quick crossword No 15,745 — 2020-10-22 23:00:38
  13D: Difficult problem (7)