| NOCTURNAL | Ran cult on structure that's active at night (9) |
| OWL | Flat-faced bird that's active at night |
| TECTONICS | Work on structure increasing strength in eyes (9) |
| BOBBYSOCK | Cult on officer's garment (5,4) |
| LUCRATIVE | It might be profitable but is endlessly evil to arm cult, on the contrary |
| OPENCHAIN | Molecular structure that's linked with one chap moving home (4,5) |
| HEMICYCLE | Structure that's half round border, one requiring vehicle |
| INTERALIA | Break spent very intensely active at first among other things |
| DIURNAL | Two-toed sloths are nocturnal, being most active at night. While three-toed sloths are ___ which means they are most active during the day |
| BAT | One active at night club? |
| CRICKETBAT | Willow bug, a creature active at night (7,3) |
| HIGHPRIEST | Head of cult on a trip snoops on travellers initially |
| UNICEF | Children's org. that's active on Halloween |
| COLLECTIVENOUN | Novel cult on ice arranged murder, for example (10,4) |
| INVENTEDSOURCES | My paper on 'Structure of the Amazon River System' was rejected for containing... |
| PARSEC | Work on structure, and velocity of light, to get measure of universe |
| SEARCH | Look for subtle extremities on structure (6) |
| ACROSTIC | A clue-type relying on structure: this illustrative clue primarily? (8) |
| CONFORMITY | Agreement on structure maintained in heavily populated area (10) |
| PYRE | Structure that's set on fire |
