Luxury food coming from America via Russia (6)

I believe the answer is:

caviar

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'luxury food' is the definition.
'caviar' can be an answer for 'food' (caviar is a kind of food). I'm not sure about the 'luxury' bit.

'from america via russia' is the wordplay.
'from' says the answer is hidden in the clue.
'CAVIAR' can be found hidden inside 'america via russia'.

'coming' is the link.

Can you help me to learn more?

(Other definitions for caviar that I've seen before include "Sturgeon eggs" , "... prized delicacy" , "Sturgeon delicacy" , "produce of Russia?" , "Expensive roe" .)

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