Colourful type from major hospital spoke out with intelligence (4,6)
I believe the answer is:
grey matter
'intelligence' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for grey matter that I've seen before include "Intelligence; the brain" , "intellectual capacity?" , "Issue lacking clear boundaries" , "stuff in the head" , "Brains" .)