| ASTHECROW | (& 22-down) Heading off last, he, bird and insects go in a straight line (2,3,4,5) |
| IRKS | Slow down, heading off to tidy bed (4) |
| BROADS | Waterways of East Anglia, rich in bird and insect life (6) |
| ROVE | Not go in a straight line |
| REARMOST | Re-equip army heading off last |
| MATUTINAL | Runner from Utah heading off last before noon (9) |
| LINEAR | "Sending All My Love" band that goes in a straight line? |
| TWILIGHT | Time around dawn or dusk when crepuscular animals, birds and insects, including barn owls, foxes, hawk moths, nightjars, pipistrelles and tawnies, are most active (8) |
| CHIRPS | Sounds made by some birds and insects |
| FLIGHTLESS | Of birds and insects, incapable of taking wing (10) |
| SNOB | Does he look down his nose as at last he finds work? (4) |
| LANDROVER | Come down, heading for Ramsey, with too much in vehicle (4,5) |
| SWARM | A lot of insects go south to the comfortable heat (5) |
| BELLES | Insects go around a couple of students - pretty girls (6) |
| THEOREM | At last, he got more involved in a scientific proposition (7) |
| THEME | At last, he took me on with a topic for discussion (5) |
| COSSETING | Insects go berserk - tender care needed |
| COBBLER | At last he has a job |
| RATTAIL | Grenadier - the last he sees of a rodent |
| THESIS | At last, he is getting on with a second dissertation (6) |
