Crossword Genius

Frank's university (4)

Ross

I believe the answer is:

open

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This clue might be a double definition.

'frank's' is the first definition.
(synonyms)

'university' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

Can you help me to learn more?

(Other definitions for open that I've seen before include "Unfasten" , "This championship includes both professional and amateur golfers" , "Traditional room heater" , "Frank - unsettled" , "begin to > crack" .)

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