Scandinavian girl makes unusual gain (4)

I believe the answer is:

inga

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'scandinavian girl' is the definition.
'Inga' can be an answer for 'girl'. I'm not certain of the 'scandinavian' bit.

'unusual gain' is the wordplay.
'unusual' is an anagram indicator.
'gain' with letters rearranged gives 'INGA'.

'makes' acts as a link.

Can you help me to learn more?

(Another definition for inga that I've seen is " Name; gain (anag.)".)

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

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