Crossword Genius

Apparently noisy food (4)

Ross

I believe the answer is:

nosh

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'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)'" .)

I've seen this clue in The Guardian.
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