| Rating | Solver | Clue |
|---|---|---|
| KEY | Crucial | |
| CRITICAL | Crucial | |
| ESSENTIAL | Crucial | |
| WATERSHED | Crucial event | |
| PIVOTAL | Of crucial importance | |
| CLIMACTIC | Crucial, of a storyline | |
| VITAL | Bringing back some relatives is crucial | |
| ACIDTEST | Dictates novel order for crucial appraisal | |
| CRISIS | A turning point; a crucial event | |
| MASTERKEY | Title crucial – it opens all doors | |
| IMPORTANT | Crucial to own up to being harbour insect | |
| CHIASMA | A commissure; especially, the optic commissure, or crucial union of the optic nerves. | |
| CRUCIAL | Severe; trying or searching, as if bringing to the cross; decisive; as, a crucial test. | |