Crossword Genius

Some French bloke (3)

Ross

I believe the answer is:

des

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'some french' is the definition.
('some' in French)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for des that I've seen before include "- O'Connor, Br. singer" , "and 9 Across: Former 'Countdown' host" .)

I've seen this clue in The Independent.
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