INDEFATIGABLE

Untiring — I fled a beating (anag) (13)

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

• Quick crossword No 16,369 — 2022-10-23 23:00:50
  6D: Tireless (13)
• Quick crossword No 15,707 — 2020-09-08 23:00:01
  1A: Untiring — I fled a beating (anag) (13)