Thoughtful character (4)
I believe the answer is:
kind
I believe this clue is a double definition.
'thoughtful' is the first definition.
(synonyms)
'character' is the second definition.
(I've seen this before)
(Other definitions for kind that I've seen before include "Class, type" , "Taking a plunge" , "Generously disposed" , "Sort of compassionate" , "Friendly - type" .)