Cane syrup (7)
I believe the answer is:
treacle
'cane syrup' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for treacle that I've seen before include "Something cloyingly sweet" , "Contrived sentimentality - sticky substance" , "Sticky fluid" , "Viscous liquid" , "Thick, sticky, dark syrup" .)