Self Esteem's almost completed prestigious set of awards (3)
I believe the answer is:
ego
'self esteem's' is the definition.
(I've seen this in another clue)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ego that I've seen before include "See 21 Down" , "(Person's) sense of self-esteem" , "One's sense of self-importance" , "One's image of oneself" , "Morale" .)