LAVA

Volcanic molten rock (4)

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

• Quick crossword No 16,604 — 2023-07-24 23:00:23
  8A: Molten rock flowing from a volcano (4)
• Quick crossword No 16,050 — 2021-10-14 23:00:12
  21A: Volcanic molten rock (4)