Little bit sweet (6)
I believe the answer is:
trifle
I believe this clue is a triple definition!
'little' is the first definition.
(thesaurus)
'bit' is the second definition.
(I have seen 'A bit' mean 'trifle' so perhaps 'bit' could also mean 'trifle')
'sweet' is the third definition.
(trifle is a kind of sweet)
(Other definitions for trifle that I've seen before include "Insignificant item - dessert" , "Dessert - something unimportant" , "Something of small importance" , "A desert of no importance" , "Amuse oneself" .)