Song of the South (5)

I believe the answer is:

dixie

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'south' is the definition.
(synonyms)

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

(Other definitions for dixie that I've seen before include "Army cooking pot - the southern states of the USA" , "Southern states that seceded from the USA in 1861" , "Southern states of USA - and a rousing song" , "Large iron cooking pot" , "South America's" .)

I've seen this clue in the Wall Street Journal and the New York Times.

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