Crossword Genius

Man of principle made riches in a way (10)

Ross

I believe the answer is:

archimedes

'man of principle' is the definition.
(I've seen this before)

'made riches in a way' is the wordplay.
'in a way' is an anagram indicator.
'made'+'riches'='maderiches'
'maderiches' with letters rearranged gives 'ARCHIMEDES'.

(Other definitions for archimedes that I've seen before include "Old mathematician" , "'Eureka' scientist" , "Greek physicist" , "Greek mathematician and inventor" , "Greek mathematician ('Eureka')" .)

I've seen this clue in The Globe and Mail.
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