One in Brando's career? (5)
I believe the answer is:
oscar
'one' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'in brando's career?' is the wordplay.
'in' indicates the answer is hidden within the clue.
'OSCAR' is hidden within 'brandos career'.
Can you help me to learn more?
(Other definitions for oscar that I've seen before include "One of several given to Chicago" , "letter read out on radio" , "US film award" , "academy's prize" , "Boy" .)