French philosopher's timeless stuff out of top drawer? Just the opposite (8)

I believe the answer is:

rousseau

'french philosopher's' is the definition.
(18th-century philosopher Jean-Jacques Rousseau)

I don't understand the rest of the clue.

(Other definitions for rousseau that I've seen before include "Jean Jacques --, French philosopher" , "Is Esau sour about the Swiss philosopher?" , "Jean Jacques - - , author of 'Confessions'" , "Henri -, French painter aka Le Douanier" , "He did paintings" .)

I've seen this clue in The Guardian.

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