OEDIPUS

Mythical king of Thebes, who unknowingly killed his father and married his mother (7)

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

• Quick crossword No 16,555 — 2023-05-28 23:00:01
  2D: Mythical Greek king with a complex — Opus Dei (anag) (7)
• Quick crossword No 16,333 — 2022-09-11 23:00:44
  13D: Mythical king of Thebes, who unknowingly killed his father and married his mother (7)