Apple sauce (7)
I believe the answer is:
custard
This might be a double definition.
'apple' is the first definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'sauce' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for custard that I've seen before include "Egg/milk bake" , "Cooked mixture of milk and eggs" , "Yellow mixture" , "Dessert sauce" , "Type of apple" .)