Extraordinary thing, word complete (9)
I believe the answer is:
downright
'complete' is the definition.
(similar in meaning)
'extraordinary thing word' is the wordplay.
'extraordinary' indicates anagramming the letters.
'thing'+'word'='thingword'
'thingword' anagrammed gives 'DOWNRIGHT'.
(Other definitions for downright that I've seen before include "blunt" , "Completely" , "Utter, complete" , "rank" , "Unequivocally" .)