Sound of a grilling (6)
I believe the answer is:
sizzle
'sound of a grilling' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sizzle that I've seen before include "Sound of a spitting sausage?" , "Fry" , "Fizz in the pan" , "Hot hiss" , "Sound of frying sausages" .)