Take stock of freak result (6)
I believe the answer is:
rustle
'take stock' is the definition.
(rustle can mean to steal cattle or stock)
'freak result' is the wordplay.
'freak' is an anagram indicator (a freakish form of the letters).
'result' anagrammed gives 'RUSTLE'.
'of' is the link.
(Other definitions for rustle that I've seen before include "The sound of leaves in the wind" , "Dry crackling sound" , "take animals" , "Swish - steal cattle" , "Steal livestock - make a little noise" .)