There's no silence while you're eating it (4)
I believe the answer is:
nosh
'while you're eating it' is the definition.
I can't judge whether this definition defines the answer.
'there's no silence' is the wordplay.
'there's' becomes 'n' (I've seen this in other clues).
'no' becomes 'O' (resembles 0 - 'no' can mean 'zero').
'silence' becomes 'sh' ('sh' is said to tell someone to be silent).
'n'+'o'+'sh'='NOSH'
Can you help me to learn more?
(Other definitions for nosh that I've seen before include "eating this?" , "Eat (sl.)" , "'Food, grub (4)'" , "Eats" , "Scoff" .)