Notice two Best Supporting Actress Oscar winners make decision (10)
I believe the answer is:
adjudicate
'notice' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how they can define each other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for adjudicate that I've seen before include "Adjudge" , "Decide between contestants" , "Pronounce decision" , "Judge" , "Decide officially on a dispute" .)