Charm is not radiated by a king's man (10)
I believe the answer is:
monarchist
'a king's man' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'charm is not radiated' is the wordplay.
'charm is not' anagrams to 'MONARCHIST'.
But, I am unsure how the anagram is indicated.
'by' is the link.
Can you help me to learn more?
(Other definitions for monarchist that I've seen before include "Supporter of hereditary rule" , "Royal supporter" .)