| Rating | Solver | Clue |
|---|---|---|
| BURROW | Tunnel | |
| CULVERT | Water tunnel | |
| SEWER | Waste tunnel | |
| SUBWAY | Pedestrian tunnel | |
| UNDERPASS | Pedestrian tunnel | |
| TUN-DISH | A tunnel. | |
| TUNNELED | Of Tunnel | |
| TUNNELING | Of Tunnel | |
| TUNNELLED | Of Tunnel | |
| TUNNELLING | Of Tunnel | |
| BURRO | Donkey’s bottomless tunnel? | |
| CATACOMB | Early Christian hide-out tunnel | |
| BORER | Wearisome type who drills tunnel | |
| CHUNNEL | Tunnel under the English Channel | |
| SHAFT | Mine’s tunnel buried in fresh aftershocks | |
| NORTHCONNEX | Which is Australia’s deepest road tunnel? | |
| TUNNEL | To catch in a tunnel net. | |
| MIDFEATHER | A support for the center of a tunnel. | |
| ITALY AND FRANCE | The Mont Blanc tunnel links which two European countries? | |
| STALAG | Sublet hallway but take lethal trainee out to tunnel | |
| DRIVE | To dig Horizontally; to cut a horizontal gallery or tunnel. | |
| AIR SHAFT | A passage, usually vertical, for admitting fresh air into a mine or a tunnel. | |
| EXCAVATION | An uncovered cutting in the earth, in distinction from a covered cutting or tunnel. | |
| POLING | One of the poles or planks used in upholding the side earth in excavating a tunnel, ditch, etc. | |
| FACE | The end or wall of the tunnel, drift, or excavation, at which work is progressing or was last done. | |