| Rating | Solver | Clue |
|---|---|---|
| ARIL | Hard outer covering | |
| SHELL | Hard outer covering | |
| PERIDERM | The hard outer covering of hydroids and other marine animals; the perisarc. | |
| CRUST | The hard external coat or covering of anything; the hard exterior surface or outer shell; an incrustation; as, a crust of snow. | |
| SKIN | Outer covering | |
| VEST | Any outer covering; array; garb. | |
| RIND | Hard outer layer of right hand | |
| ENAMEL | Hard outer layer of a tooth | |
| CRUSTS | Slice parts of hard outer layers | |
| PERISPORE | The outer covering of a spore. | |