Starchy pudding (4)
I believe the answer is:
sago
'starchy pudding' is the definition.
(type of pudding)
This is all the clue.
(Other definitions for sago that I've seen before include "dessert?" , "Edible powdery starch" , "Starchy grain used in desserts" , "Powdery starchy food" , "Starchy cereal used in puddings" .)