Divide up last of the sweet (4)
I believe the answer is:
cute
'sweet' is the definition.
(I've seen this before)
'divide up last of the' is the wordplay.
'divide up' becomes 'cut' (to cut is to divide into pieces).
'last of' says to take the final letters.
The final letter of 'the' is 'e'.
'cut'+'e'='CUTE'
(Other definitions for cute that I've seen before include "Clever - attractive" , "Attractive or quaint, as in America" , "Winsome" , "Pretty and attractive" , "Location" .)