Unfortunately goes to butt of jokes (6)
I believe the answer is:
stooge
'butt of jokes' is the definition.
(a stooge is the butt or victim of a joke)
'unfortunately goes to' is the wordplay.
'unfortunately' indicates anagramming the letters (a bad or unfortunate spelling).
'goes'+'to'='goesto'
'goesto' with letters rearranged gives 'STOOGE'.
(Other definitions for stooge that I've seen before include "Comedian's assistant-victim" , "Performer who is butt of another's jokes" , "Butt of a comic's jokes" , "Toes go wrong for the scapegoat" , "A comedian's stage butt or straight man" .)