Noise is different result (6)
I believe the answer is:
rustle
'noise' is the definition.
(I know that rustle is a type of noise)
'different result' is the wordplay.
'different' indicates anagramming the letters (letters placed in a different order).
'result' with letters rearranged gives 'RUSTLE'.
'is' is the link.
(Other definitions for rustle that I've seen before include "Low sound of rubbing" , "Wind-in-leaves noise" , "take animals" , "Whisper softly" , "Dry crackling sound" .)