But he wouldn't be dropped out of an aeroplane! (5)
I believe the answer is:
pilot
This clue might be a double definition.
'but he wouldn't be dropped' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'an aeroplane' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'out of' is the link.
Can you help me to learn more?
(Other definitions for pilot that I've seen before include "Guide, flyer" , "Plane's operator" , "Airman" , "Trial broadcast" , "Steer (a ship or plane)" .)