ELM

Tough timber (3)

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

• Quick crossword No 16,588 — 2023-07-05 23:00:45
  2D: Deciduous tree (3)
• Quick crossword No 15,202 — 2019-01-28 00:00:47
  21A: Tough timber (3)