Bird needin' more air (6)
I believe the answer is:
puffin
'bird' is the definition.
(puffin is a kind of bird)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for puffin that I've seen before include "Variety of auk" , "Seabird (breathin' heavily?)" , "Species of auk" , "Diving bird" , "diver" .)