1,add R to a shaft of light(not ray)
2 a birds resting place
3 you wont ride on these
4 ancient weapon
5 'there's a fish in us' in a song
6 very strong
7 Cloud formation
8 non-swimmers do this in deep water
9 Must be valueable
10 a name for eight cats
11 An added S makes an awful smell
12 a vehicle with a P at the back
13 a fish called fido
14 Without a T they could be in charge of operations
15 a native of Whitstable
16 A slipper customer
17 a mock of lock
18 sounds like its got a girls toy on its back