Unusual sort's reputation (9)
I believe the answer is:
character
This clue is a double definition.
'unusual sort's' is the first definition.
(character can mean an eccentric person)
'reputation' is the second definition.
(I know that character is a type of reputation)
(Other definitions for character that I've seen before include "Make-up" , "Letter or figure" , "card" , "Quality" , "Distinctive nature" .)