Steal cattle with unfortunate result (6)
I believe the answer is:
rustle
'steal cattle' is the definition.
(I've seen this in another clue)
'unfortunate result' is the wordplay.
'unfortunate' indicates an anagram.
'result' with letters rearranged gives 'RUSTLE'.
'with' acts as a link.
(Other definitions for rustle that I've seen before include "Steal ((eg, cattle)" , "Steal livestock - make a little noise" , "Steal (cattle, etc)" , "Swish - lustre (anag)" , "Swish - steal cattle" .)