Who published articles in German about scientific topics originally? (8)

I believe the answer is:

einstein

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'who' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

I cannot understand how the remainder of the clue works.

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(Other definitions for einstein that I've seen before include "Brilliant scientist" , "Bavarian" , "Nineties (anag.)" , "Albert -, relativity physicist" , "Father of Relativity" .)

I've seen this clue in The Guardian.

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