A man of principle deems chair repairable (10)
I believe the answer is:
archimedes
'a man of principle' is the definition.
(I've seen this before)
'deems chair repairable' is the wordplay.
'deems chair' anagrams to 'ARCHIMEDES'.
However, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for archimedes that I've seen before include "Greek mathematician and inventor" , "Syracusan" , "Old scientist" , "Man of principle" , "Ancient Greek scientist (of buoyancy principle)" .)