Establish it's some kind of educational organisation (9)

I believe the answer is:

institute

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

'establish' is the definition.
(I know that establish can be written as institute)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for institute that I've seen before include "Scientific, educational or social organisation" , "college" , "Educational organisation, found or begin one" , "Establish, educational organisation" , "Set in motion, establish" .)

I've seen this clue in the Evening Standard.

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.