Down
1
Behave strangely when one goes off them? (5)
2
Infectious disease of the nervous system (5)
3
Vegetarian tum (anag) – not easy-going (13)
5
Isambard Kingdom Brunel, for instance (5,8)
6
Fire at from the air (6)
7
The aorta, for instance (6)
15
One's set to keep watch (6)
16
Harmful individual or thing (6)
20
Stop at the roadside (3-2)