| CAISSON | A watertight chamber used for carrying out construction work under water |
| COFFER | From "chest, basket", a strongbox for valuables; a watertight chamber; or, a sunken lacunar in a ceiling (6) |
| RAINGAUGES | They are used for carrying out spot checks! (4-6) |
| OVEN | Chamber used for baking (4) |
| DIVER | A plunger may work under water (5) |
| UTILITY | Practicality; a handy thing; a gas, electricity or other service provider; a computer program for carrying out a routine task; or, with "room", one's household laundry (7) |
| CAMERA | Latin word for "chamber" used to describe a photography device, the papal treasury, a judge's private room or a round building, such as that near the Bodleian Library (6) |
| DIVERS | They work under water (6) |
| DIVERT | Reroute one who works under water close to port (6) |
| KAYAK | A canoe made with a light frame and a watertight covering invented by the Inuit |
| COFFERDAM | Bid breaking record, a million for a watertight structure (9) |
| ACCOUNT | A facility with a bank or building society for carrying out financial transactions and storing money (7) |
| SCHEDULE | A plan for carrying out a process or procedure, giving lists of intended events and times (8) |
| AROMATHERAPY | Artist back to pay a mother for carrying out treatment (12) |
| SCAFFOLDER | One who puts up temporary platforms around a building for repairs and construction work (10) |
| TOKAMAK | A doughnut-shaped chamber used in fusion research. |
| JUBILEECLIP | Metal loop with a screw fitting tightened to form a watertight connection (7,4) |
| CRYPT | Cellar, vault or underground chamber used as a chapel or burial place (5) |
| EXECUTIVE | Responsible for carrying out agreed policies (9) |
| AUTOCLAVE | Strong sealed vessel for carrying out chemical reactions (9) |
