Orpheus, perhaps, strictly reviewed - even scot-free (6)
I believe the answer is:
lyrist
'orpheus' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lyrist that I've seen before include "poetic type" , "old musician" , "Poet" , "Orpheus, maybe" .)