Sounds the end of a language (7)

I believe the answer is:

finnish

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'language' is the definition.
(language of Finland)

I cannot understand how the rest of the clue works.

(Other definitions for finnish that I've seen before include "race" , "European language" , "Eg, native to Helsinki" , "foreign language" , "Nationality of citizens of Helsinki" .)

I've seen this clue in The Globe and Mail.

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