French existentialist philosopher (6)

I believe the answer is:

sartre

'french existentialist philosopher' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for sartre that I've seen before include "French philosopher, 1905-80" , "Jean-Paul -, French philosopher/author" , "Jean Paul . . ., French existentialist writer" , "Sooner" , "French philosophic writer" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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