Revolution in older Danish state (5,6)

I believe the answer is:

rhode island

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

'state' is the definition.
(I know that Rhode Island is a state)

'revolution in older danish' is the wordplay.
'older danish' can be anagrammed to 'RHODE ISLAND'.
However, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for rhode island that I've seen before include "One of the original 13 US states" , "RI (US)" , "Smallest US state" , "Part of America" , "Smallest state of the USA" .)

I've seen this clue in The Telegraph.

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