A possibly dangerous glider (5)
I believe the answer is:
snake
'a possibly dangerous glider' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for snake that I've seen before include "For instance, adder" , "Wind" , "Long slender reptile" , "Carnivorous reptile" , "Move sinuously" .)