SHELL

Explosive projectile (5)

Solution has appeared in 3 crosswords (1 across and 2 down):

• Quick crossword No 15,871 — 2021-03-20 00:00:10
  17D: Hard outer covering (5)
• Quick crossword No 15,575 — 2020-04-07 23:00:01
  11A: Conch, perhaps (5)
• Quick crossword No 15,331 — 2019-06-26 23:00:28
  1D: Explosive projectile (5)