Leafy vegetables (6)
I believe the answer is:
greens
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">leafy vegetables</span>' is the definition.<br/ ><span class="explanation-format__explanation">('green' can be a synonym of 'leafy vegetable')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for greens that I've seen before include "Ecology party" , "identified by little flags" , "Putting areas" , "Signs people should go" , "Vegetables - on the golf course?" .)