Noisy, bad, and as much as one can take! (4)
I believe the answer is:
fill
'take' is the definition.
(I know that fill is a more specific form of eat)
'noisy bad' is the wordplay.
'noisy' becomes 'f' ().
'bad' becomes 'ill' (associated in meaning).
'f'+'ill'='FILL'
'and as much as one can' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for fill that I've seen before include "Satisfy (a need)" , "Be suitable - . . . . the bill" , "Appoint person to (post)" , "Repair tooth" , "Plug (a gap)" .)