Whispering when there's bad result (6)
I believe the answer is:
rustle
'whispering' is the definition.
(whispering sound)
'bad result' is the wordplay.
'bad' is an anagram indicator.
'result' with letters rearranged gives 'RUSTLE'.
'when there's' is the link.
(Other definitions for rustle that I've seen before include "making little noise" , "Result (anag.)" , "Swish - lustre (anag)" , "Make sound as of paper crumpling - or steal cattle" , "Steal (cattle, etc)" .)