Low fellow proficient in gliding (5)
I believe the answer is:
snake
'low fellow proficient in gliding' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps 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 "Slithering reptile" , "Chinese zodiac animal" , "Move sinuously" , "Wind" , "Limbless reptile" .)