Crossword Genius

What was founded as the Collegiate School in Killingworth, Connecticut (4)

Ross

I believe the answer is:

yale

(Other definitions for yale that I've seen before include "security device" , "Member of the 11 - type of lock" , "Heraldic animal" , "member of College League" , "American university or kind of lock" .)

I've seen this clue in The New York Times.
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