Naive (5)
'naive' is the definition.
(I know that naive can be written as green)
This is the entire clue.
(Other definitions for green that I've seen before include "Consultative document" , "Immature" , "The colour of envy" , "Permission to proceed" , "Inexperienced - olive coloured" .)
'naive' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for artless that I've seen before include "Without pretension" , "as an empty gallery" , "Natural - uncontrived" , "Naive - unskilful" , "Free from cunning" .)