| BERNOULLI | Mathematician Daniel after whom a principle is named |
| PAULI | Wolfgang *****, Austrian physicist after whom a principle in quantum mechanics is named (5) |
| TENET | A principle is reversed without showing any change (5) |
| PAINE | Patriot who said "Moderation in temper, is always a virtue; but moderation in principle, is a species of vice" |
| GERM | A first principle is in danger, mainly (4) |
| WORKETHIC | Labour's moral standard in principle is a job worth doing well (4,5) |
| BASIS | The first principle is to follow the bachelors (5) |
| TENEMENT | Principle is keeping lower ranks in poor accommodation (8) |
| OCCAM | One scientific principle is -'s razor |
| PRINCIPAL | The other principle is picked up first (9) |
| POSTULATE | Fundamental principle is to make demands (9) |
| TAOISEACH | National leader of absolute principle - is every single person in support? |
| RUDIMENT | First principle is that smallest one should accept little money (8) |
| TNT | Explosive principle is odd (3) |
| ELEMENT | The first principle is that Lee must have tea with his men (7) |
| IDEALS | Due to moral principles, is out of business |
| RULE | Word for a graduated strip of metal or wood; a code of religious life; a principle of conduct or procedure; or, a standard of estimation (4) |
| CANON | Rule in ecclesiastical matters; a principle applied in a branch of learning such as philosophy or art; a list of saints; or, the works of any author accepted as genuine (5) |
| LAW | Body of rules collectively forming a jurisprudence; or, a principle or code of conduct in art, etiquette, honour, morality or a sport such as cricket or tennis (3) |
| EDUCE | Deduce (a principle) or construe (a meaning). |
