Colour, being inexperienced (5)
I believe the answer is:
green
This clue is a double definition.
'colour' is the first definition.
(I know that Green is a type of colour)
'inexperienced' is the second definition.
(similar in meaning)
'being' is the link.
(Other definitions for green that I've seen before include "Raw - inexperienced" , "conservationist" , "Party label" , "Colour of malachite" , "Verdant; naive" .)