Related Clues:

• Putting area right environmentally
• Innocent and clever - then one goes to university
• Unripe; environmentalist
• Reflections on choice confronting traveller who sees the light (In the red and -----)
• Like lettuce, raw, as part of course
• Innocent, unsuspecting
• Environmentally-friendly form of energy running out early
• Living, he wrote nothing
• Party label one may be putting on
• Naive conservationist
• Inexperienced; showing amazement
• Resourceful university replaces one, becoming green
• Frank is skilful getting small change
• Unripe; envious
• Discuss the reason it's coloured green