Pancake topping (5)
I believe the answer is:
syrup
'pancake topping' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for syrup that I've seen before include "Sticky sugar spread" , "Sticky stuff" , "Boiled sugar solution" , "Grenadine, for example" , "Sugary liquid" .)