Crossword Genius

Meet with French chap upset about matter he ingested (9)

Ross

I believe the answer is:

encounter

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This could be a double definition.

'meet with' is the first definition.
(thesaurus)

'french chap upset about matter he ingested' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

Can you help me to learn more?

(Other definitions for encounter that I've seen before include "Unexpected meeting" , "battle" , "Come upon, meet" , "Meet; confrontation" , "Bump into" .)

I've seen this clue in The Guardian.
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