Crossword Genius

USA's real upset with Moscow’s fashion? (1,2,5)

Ross

I believe the answer is:

a la russe

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'moscow's fashion?' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'usa's real upset' is the wordplay.
'upset' is an anagram indicator.
'usas'+'real'='usasreal'
'usasreal' with letters rearranged gives 'A LA RUSSE'.

'with' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.
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