| GASTROPOD | ... to drop gas out of a mollusc |
| EXHAUST | Pipe carrying gas out of a car's engine (7) |
| 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) |
| 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) |
| UNIVALVE | Of a mollusc, having a shell composed of a single piece (8) |
| OILMAN | Owner of company producing energy and gas out of magnolias (6) |
| VALVE | Either of the two hinged parts of the shell of a mollusc such as an oyster, mussel etc. (5) |
| OPERCULUM | Hard flap covering certain apertures, e.g. the gill slit of a fish or the shell opening of a mollusc (9) |
| DEFLATE | Let the air or gas out of something (7) |
| EXHAUSTPIPE | Tube conveying gas out of an engine (7,4) |
| DEFLATES | Lets air or gas out of (8) |
| DEGAS | Let gas out of French painter? (5) |
| SHELL | Exoskeleton of a mollusc such as a cockle or oyster (5) |
| NACRE | This iridescent shell layer of a mollusc is also known as mother-of-pearl |
| SHUCK | Remove the shell (of a mollusc) |
| CLAIM | One part of a mollusc, say (5) |
| OYSTERSHELL | The hard covering of a mollusc (6-5) |
| AMMONITE | Coiled fossil shell of a mollusc (8) |
| SEASHELL | Covering of a mollusc (8) |
