Excessive university cuts subordinate detailed (5)

I believe the answer is:

undue

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'excessive' is the definition.
(I know that excessive can be written as undue)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for undue that I've seen before include "Lacking justification" , "Not warranted" , "Extreme" , "Improper" , "Excessive - unwarranted" .)

I've seen this clue in The Telegraph.

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