Bird of less importance, one hears (4)

I believe the answer is:

myna

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'bird' is the definition.
(myna is a kind of bird)

I don't understand how the rest of the clue works.

(Other definitions for myna that I've seen before include "Asian bird" , "Bird good at mimicry" , "Asiatic bird imitating human speech" , "Speech-mimicking bird" , "Mimicking bird" .)

I've seen this clue in The Irish Independent.

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