Whisper result, wrongly (6)
I believe the answer is:
rustle
'whisper' is the definition.
('rustle' can be a synonym of 'whisper')
'result wrongly' is the wordplay.
'wrongly' is an anagram indicator.
'result' is an anagram of 'RUSTLE'.
(Other definitions for rustle that I've seen before include "making little noise" , "Steal livestock - make a little noise" , "Low sound of rubbing" , "Steal cattle in the old West" , "Steal (cattle, etc)" .)