| Clue | Length | Answer |
|---|---|---|
| Hard and fast | 3 letters | set |
| Hard and fast | 5 letters | tight |
| Hard and fast | 5 letters | rigid |
| Hard and fast | 8 letters | required |
| Hard and fast | 8 letters | standard |
| Hard and fast | 8 letters | ultimate |
| Hard and fast | 8 letters | ironclad |
| Hard and fast | 9 letters | statutory |
| Hard and fast | 10 letters | preceptive |
| Hard and fast | 10 letters | prescribed |
| Hard and fast | 10 letters | regulation |
| Hard and fast | 11 letters | unalterable |
| Hard and fast | 12 letters | prescriptive |
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