Red or green? (3)
I believe the answer is:
raw
This clue is a double definition.
'red' is the first definition.
(thesaurus)
'green?' is the second definition.
(both can mean naive or inexperienced)
'or' is the link.
(Other definitions for raw that I've seen before include "Unrefined" , "Naked" , "Red and inflamed" , "Not cooked" , "Not prepared" .)