Crossword Genius

They rack their brains for the names of philosophers (8)

Ross

I believe the answer is:

thinkers

I'm a little stuck... Click here to teach me more about this clue!

'philosophers' is the definition.
The definition and answer can be both people as well as being plural nouns.
Maybe you can see an association between them that I don't see?

I don't understand the rest of the clue.

Can you help me to learn more?

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