Immortal, but he needed an unusual amount of luck to get in front (6)
I believe the answer is:
vulcan
This could be a double definition.
'immortal' is the first definition.
(Vulcan is an example)
'he needed an unusual amount of luck to get in front' is the second definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'but' acts as a link.
Can you help me to learn more?
(Other definitions for vulcan that I've seen before include "Roman god of fire and metalworking" , "Bomber" , "Roman smithing god" , "with fire power" , "Greek god of fire" .)