Crossword Genius

Behind in French coursework? (8)

Ross

I believe the answer is:

derriere

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'behind' is the definition.
(synonyms)

I don't understand how the rest of the clue works.

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(Other definitions for derriere that I've seen before include "Seat" , "Fourteen down's [FRENCHMAN] behind" , "(French?) behind" , "A French backside or buttocks" , "One's backside in France" .)

I've seen this clue in The Times.
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