Overtures returned with interest? (8)

I believe the answer is:

advances

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'overtures' is the definition.
('advance' can be a synonym of 'overture')

I can't explain the rest of the clue.

(Other definitions for advances that I've seen before include "Moves or puts forward" , "Moves forwards in a purposeful way" , "Amounts paid before they're earned" , "Loand - or amorous approaches" , "Loans" .)

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

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