Less green (5)
I believe the answer is:
riper
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">less green</span>' is the definition.<br/ ><span class="explanation-format__explanation">('ripe' can be the opposite of 'green' so perhaps 'riper' is reasonable for 'less green')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for riper that I've seen before include "(Of fruit) more mature" , "like a better mousetrap?" , "More mature and ready to be eaten" , "Maturer" , "On the way to getting mellow" .)