Crossword Genius

Study old money in European kingdom (7)

Ross

I believe the answer is:

denmark

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

'european kingdom' is the definition.
'denmark' can be an answer for 'kingdom' (I've seen this before). I am unsure of the 'european' bit.

'study old money' is the wordplay.
'study' becomes 'den' (den can mean an office or study).
'old money' becomes 'mark' (I've seen this before).
'den'+'mark'='DENMARK'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for denmark that I've seen before include "Scandinavian country" , "Hamlet's homeland" , "Monarchy, a member of the European Union" , "North European country" , "Aarhus is its second-largest city" .)

I've seen this clue in The Everyman puzzle in The Observer.
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