Virgil, perhaps brilliant, beginning to end (4)
I believe the answer is:
earp
This could be a double definition.
'virgil' is the first definition.
Both the answer and definition are singular nouns.
Maybe you can see an association between them that I can't see?
'perhaps brilliant beginning to end' is the second definition.
I can't tell whether this defines the answer.
Can you help me to learn more?
(Other definitions for earp that I've seen before include "Wyatt - - (US marshal)" , "Wyatt --, US law officer" , "Wyatt --, Tombstone lawman" , "Wyatt -, renowned US lawman" , "Wyatt - (O.K. Corral)" .)