| SODIUMCHLORIDE | Content of oceans symbolised (in various cases) in barnacles |
| RNA | Molecule hidden in "barnacles" |
| SULPHUR | Element symbolised in front of school? (7) |
| TIMES | What is symbolised in mathematics periods (5) |
| CLEAR | Net covered in barnacle armour (5) |
| DISC | PTO, in various cases, for measure of sales? (8,4) |
| PLATINUM | PTO, in various cases, for measure of sales? (8,4) |
| ASSONANCE | Sound correspondence old granny kept in various cases |
| ESCALATES | Increases being, in various cases, overdue (9) |
| DECLINE | Give various cases of diminution (7) |
| DECLINED | Refused to give the various cases to date (8) |
| DECLINING | Refusing to give the various cases? |
| SEDENTARY | Of animals remaining in one place or attached as barnacles |
| CIRRIPEDIA | Subclass of marine Crustacea including the barnacles (10) |
| UBOAT | Umpteen barnacles on another tanker, first of all -- vessel going under (1-4) |
| CRUSTACEA | Subphylum of arthropods which includes crabs, lobsters, woodlice and barnacles (9) |
| DARWIN | Naturalist whose subjects of particular interest included barnacles and earthworms |
| RS | Barnacles regularly harvested at any time in Scotland |
| ANCE | Barnacles regularly harvested at any time in Scotland |
| ICEBERGS | Shipping hazards kill barnacles, eiders, razorbills, gannets and seagulls in the beginning |
