Crossword Genius

Start school (9)

Ross

I believe the answer is:

institute

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

I cannot understand how the remainder of the clue works.

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(Other definitions for institute that I've seen before include "Organisation for promotion of scientific or educational activity" , "Establish, educational organisation" , "college" , "order as before" , "asylum, possibly?" .)

I've seen this clue in The Guardian, The Globe and Mail and The Telegraph.
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