Crossword Genius

That's right, the old South (3)

Ross

I believe the answer is:

yes

'that's right' is the definition.
(right can mean yes or okay)

'the old south' is the wordplay.
'the old' becomes 'ye' (resembles a historical spelling of 'the').
'south' becomes 'S' (synonyms).
'ye'+'s'='YES'

(Other definitions for yes that I've seen before include "Agreed", "Affirmative reply", "Word of affirmation", "Of course", "Yea".)

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