It could make me try great brains (4,6)

I believe the answer is:

grey matter

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

'brains' is the definition.
(I've seen this before)

'it could make me try great' is the wordplay.
'me try great' can be anagrammed to 'GREY MATTER'.
However, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for grey matter that I've seen before include "stuff in the head" , "Intelligence; the brain" , "intellectual capacity?" , "Issue lacking clear boundaries" , "Brain tissue" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.