| SHUCK | Remove the shell (of a mollusc) |
| PEEL | Remove the shell of, as a shrimp |
| NACARAT | Word, thought to be referring to a colour of the shell of a mollusc that yields mother-of-pearl, for a shade of orangey-red or "sunset"; or, a fabric/linen dyed in such a hue (7) |
| VALVE | Either of the two hinged parts of the shell of a mollusc such as an oyster, mussel etc. (5) |
| AMMONITE | Coiled fossil shell of a mollusc (8) |
| CLAMP | Word related to the name of a mollusc for a mechanical vice that also means a heap of root vegetables; a stack of bricks; or, a car immobiliser (5) |
| MANTLE | Word for a cloak or shawl, hence a blanket, coating of snow, layer of the Earth, pallium of a mollusc, tapestry, wing covert of a bird or other covering/concealing thing (6) |
| OPERCULUM | Hard flap covering certain apertures, e.g. the gill slit of a fish or the shell opening of a mollusc (9) |
| PEARL | A lustrous structure occurring on the inner surface of the shell of a clam or oyster (5) |
| SCUTE | Thickened horny or bony exoskeletal plate, as on the shell of a turtle, the skin of a crocodile etc. (5) |
| UNIVALVE | Of a mollusc, having a shell composed of a single piece (8) |
| SHIELD | Armour used to deflect projectiles and weapons; the shell of a tortoise/turtle; or, a type of escutcheon used in heraldry (6) |
| ARMADILLO | A charango is a small Andean guitar traditionally made from the shell of a what? (9) |
| PLASTRON | Bony plate forming the ventral part of the shell of a tortoise or turtle (8) |
| HUSK | Group of hares; or, the shell of a seed (4) |
| CARAPACE | Name the shell of a tortoise or the like (8) |
| MAROON | From French for "chestnut", a brownish-crimson colour, like the shell of such a conker; or, a firework that makes a loud bang, akin to the noise of a chestnut bursting in a fire (6) |
| NACRE | This iridescent shell layer of a mollusc is also known as mother-of-pearl |
| OYSTERSHELL | The hard covering of a mollusc (6-5) |
| SHELL | Exoskeleton of a mollusc such as a cockle, oyster or periwinkle (5) |
