John McCormack sang about sweetheart there in Munster (9)

I believe the answer is:

tipperary

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'in munster' is the definition.
(I know that Tipperary located in the administrative territorial entity Munster)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for tipperary that I've seen before include "somewhere in Ireland" , "Part of Ireland" , "Irish county, a long way off in song" , "Irish county, a long way away?" , "Irish community" .)

I've seen this clue in The Irish Times.

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