Crossword Genius

Bird needin' more air (6)

Ross

I believe the answer is:

puffin

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'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" .)

I've seen this clue in The Irish News.
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