A shade go-ahead but inexperienced (5)
I believe the answer is:
green
This could be a double definition.
'a shade go-ahead' is the first definition.
The answer and definition can be both human attributes as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'inexperienced' is the second definition.
(similar in meaning)
'but' is the link.
Can you help me to learn more?
(Other definitions for green that I've seen before include "bowlers here?" , ""Go" signal" , "Lincoln's colour?" , "Money" , "Genre (anag.)" .)