Idiom from social media in France (6)

I believe the answer is:

alsace

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'in france' is the definition.
('Alsace' is part of 'france')

I cannot understand how the remainder of the clue works.

(Other definitions for alsace that I've seen before include "part of France" , "White wine region of northeast France" , "somewhere in France" , "Region of France, capital Strasbourg" , "Filled pastry" .)

I've seen this clue in the Irish Times.

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