Squeal, having zero stuff to write with (4)
I believe the answer is:
oink
'squeal' is the definition.
(I know that squeal can be written as oink)
'zero stuff to write with' is the wordplay.
'zero' becomes 'O' (O resembles 0).
'stuff to write with' becomes 'ink'.
'o'+'ink'='OINK'
'having' acts as a link.
(Other definitions for oink that I've seen before include "Sow's sound" , "Sound from a sty" , "Sound made by a pig" , "Farmyard sound" , "Pig's grunt" .)