Squawking Antipodean I ignored in chain store (3)

I believe the answer is:

kea

I'm a little stuck... Click here to teach me more about this clue!

'store' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for kea that I've seen before include "NZ mountain parrot" , "Large New Zealand parrot" , "bird" , "Green NZ parrot" , "NZ flyer" .)

I've seen this clue in The Times.

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