XANADU

Kublai Khan's summer capital (6)

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

• Quick crossword No 16,588 — 2023-07-05 23:00:45
  15A: Where Kubla Khan decreed 'a stately pleasure-dome' (6)
• Quick crossword No 15,957 — 2021-06-28 23:00:00
  17D: Kublai Khan's summer capital (6)