Unblemished award? (5)
I believe the answer is:
oscar
'award?' is the definition.
(Academy Award)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for oscar that I've seen before include "Award by the Academy of Motion Picture Arts and Sciences" , "academy's prize" , "- - Peterson, pianist" , "to wit involved in row" , "One of several given to Chicago" .)