Out of pity, person's kind (4)
I believe the answer is:
type
'kind' is the definition.
(type is a kind of kind)
'out of pity person's' is the wordplay.
'out of' indicates a hidden word.
'TYPE' is hidden within 'pity person'.
(Other definitions for type that I've seen before include "Thing or person of a specified kind" , "output, printed" , "Class or group of a particular class" , "Sort - way to write" , "Category, sort" .)