Turn Oscar out anew as a singer (6)
I believe the answer is:
caruso
'a singer' is the definition.
(opera singer Enrico Caruso)
'turn oscar out anew' is the wordplay.
I cannot really see how this works, but
'turn' could be 'u' (a 'U-turn' is a kind of turn) and 'u' is found in the answer.
an anagram of 'oscar' is 'carso' which is present in the remaining letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'as' is the link.
Can you help me to learn more?
(Other definitions for caruso that I've seen before include "Enrico ---, early C20 tenor" , "Singer Enrico" , "Enrico ...... was famous Italian tenor" , "Enrico -, twentieth century Italian tenor" , "Classical tenor" .)