Get money for Ethiopian in Offaly? (4)

I believe the answer is:

birr

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'get' is the definition.
The answer and definition can be both to do with perception as well as being verbs in their base form.
Perhaps there's a link between them I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for birr that I've seen before include "African currency" , "Currency of Ethiopia" , "somewhere in Offaly" .)

I've seen this clue in The Irish Times.

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