Burnt sugar (7)
I believe the answer is:
caramel
'burnt sugar' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for caramel that I've seen before include "Sugar solution heated till brown" , "Cooked sugar" , "Shade" , "Browned syrup" , "Burnt sugar used for flavouring" .)