Beastly noise the reason tattooist might stop? (4)
I believe the answer is:
oink
'beastly noise' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for oink that I've seen before include "farmyard noise" , "Noise made by a pig" , "What farmer hears" , "Porker's cry" , "Pig's noise" .)