Apparently noisy food (4)
I believe the answer is:
nosh
'food' is the definition.
(nosh is a kind of food)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nosh that I've seen before include "Scoff" , "Food - eat greedily" , "Eat (slang) -- food (slang)" , "eating this?" , "'Food, grub (4)'" .)