Flier providing airborne delivery (5)
I believe the answer is:
stork
This might be a double definition.
'flier' is the first definition.
(stork is a kind of birdanimal)
'airborne delivery' is the second definition.
'stork' can be an answer for 'delivery' (thesaurus). I'm not certain of the 'airborne' bit.
'providing' is the link.
Can you help me to learn more?
(Other definitions for stork that I've seen before include "Large wading bird" , "Baby-carrying bird?" , "Mythological baby-bringer" , "Bird that delivers babies?" , "Long-legged bird" .)