Made up dairy produce (4)
I believe the answer is:
edam
'dairy produce' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'made up' is the wordplay.
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'made' written backwards gives 'EDAM'.
Can you help me to learn more?
(Other definitions for edam that I've seen before include "Made into a nice cheese" , "Dutch 8 across" , "Netherlands cheese" , "Red-coated cheese" , "Made (anag) - Dutch cheese" .)