Traffic light colour (5)
(Other definitions for green that I've seen before include "Ecologically correct" , "Environmental - colour" , "conservationist" , "Environment-friendly" , "Eg, avocado, emerald" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">traffic light colour</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for amber that I've seen before include "A yellowy resin" , "Warning to traffic" , "Cautionary light" , "Cautionary colour" , "Road warning" .)
(Other definitions for red that I've seen before include "Very angry, seeing this" , "See it and become angry" , "Colour of 1 across" , "- Cross; - admiral" , "Crimson" .)