Crossword Genius

Ready for a holiday in the States? (7)

Ross

I believe the answer is:

dollars

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'states?' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.

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

Can you help me to learn more?

(Other definitions for dollars that I've seen before include "US money" , "Bucks" , "American currency" , "ready for Americans" , "US currency" .)

I've seen this clue in The Times.
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