Crossword Genius

Flying pig? (6)

Ross

I believe the answer is:

gannet

'flying pig?' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps there's an association between them I don't understand?

This is the entire clue.

(Other definitions for gannet that I've seen before include "Large diving fish" , "Large diving sea bird" , "Large fish-eating bird" , "greedy type" , "Large seabird, white with dark markings" .)

I've seen this clue in The Guardian.
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