Flighty fellow? (7)
I believe the answer is:
aviator
'flighty fellow?' is the definition.
The answer and definition can be both people 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 aviator that I've seen before include "Aeronaut" , "one in a crate?" , "Pilot of plane" , "Woman in a flying machine" , "Pilot; style of sunglasses" .)