Fool's taunt about good person (6)
I believe the answer is:
jester
'fool's' is the definition.
(synonyms)
'taunt about good person' is the wordplay.
'taunt' becomes 'jeer' (jeering is a kind of taunting).
'about' indicates putting letters inside.
'good person' becomes 'st' (saint).
'jeer' going around 'st' is 'JESTER'.
(Other definitions for jester that I've seen before include "Buffoon" , "his work's funny" , "Court fool" , "Yorick" , "Clown employed to entertain a ruler" .)