Extreme University by the beach in Ireland (5)

I believe the answer is:

ultra

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

I don't understand the rest of the clue.

(Other definitions for ultra that I've seen before include "Extreme - extremist" , "Person holding extreme views" , "(As prefix) beyond or extreme" , "Prefix meaning beyond or excessively" , "Extremely; an extremist" .)

I've seen this clue in The Irish Times.

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