Chilly sounding town (4)

I believe the answer is:

birr

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

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

This is all the clue.

Can you help me to learn more?

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

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.