Advanced degree

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2,1

phd

nth

'advanced degree' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for phd that I've seen before include "Highest university degree" , "Letters denoting holder of university doctorate" , "Initially a top university degree" , "In brief, top university qualification" .)

I've seen this clue in the USA Today and The New York Times.

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