Crossword Genius

Either of the two egg-shaped masses of grey matter at the base of the brain (8)

Ross

I believe the answer is:

thalamus

(Other definitions for thalamus that I've seen before include "Grey matter at base of brain" , "Sensory part of brain; a lush mat (anag.)" , "a bit of brains" , "bit of brain" .)

I've seen this clue in The Mirror.
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