Doctor reunited with Newton leaving full of knowledge (7)

I believe the answer is:

erudite

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'full of knowledge' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for erudite that I've seen before include "Rude tie (anag.)" , "Having or showing great knowledge or learning" , "Showing profound knowledge" , "Learned and scholarly" , "Possessing great learning" .)

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