Like sugar (5)
I believe the answer is:
sweet
'like sugar' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sweet that I've seen before include "(see 15 across) A Chinese sauce" , "It is agreeable" , "Toffee, e.g." , "Melodious, not bitter" , "bon-bon" .)