Crossword Genius

Hill that is made of Canadian copper (7)

Ross

I believe the answer is:

mountie

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'canadian copper' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'hill that is' is the wordplay.
'hill' becomes 'mount' (I've seen this before).
'that is' becomes 'ie' (short for Latin 'id est', 'that is').
'mount'+'ie'='MOUNTIE'

'made of' is the link.

Can you help me to learn more?

(Other definitions for mountie that I've seen before include "Canadian police officer" , "Canadian lawman" , "Horse-riding Canadian cop" , "Canadian policeman" , "Canadian policemen" .)

I've seen this clue in the Sydney Morning Herald.
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