Sweet idiot (4)
I believe the answer is:
fool
This clue is a double definition.
'sweet' is the first definition.
(type of dessert or sweet)
'idiot' is the second definition.
(thesaurus)
(Other definitions for fool that I've seen before include "Sweet - trick" , "Jester or silly ass" , "Sweet - kid" , "mug" , "Idiot" .)