### Clue: Sage unaccompanied by that last bit of onion (5)
### Answer: SOLON 
 ### Explanation: Definition: Sage
**SOLO** ("unaccompanied") *by* [*that last bit of*]* * (onio)**N** 
Solon was an ancient Greek lawgiver (one of the Seven Sages), whose name now means a "sage"