Extraordinary deed is opposed to current trends (6)
I believe the answer is:
eddies
'opposed to current trends' is the definition.
(I've seen this before)
'extraordinary deed is' is the wordplay.
'extraordinary' indicates an anagram.
'deed'+'is'='deedis'
'deedis' with letters rearranged gives 'EDDIES'.
(Other definitions for eddies that I've seen before include "current disturbances" , "Small whirlpools off the main stream" , "Miniature whirpools" , "They flow against the main stream" , "round flowers" .)