Veg party (6)
I believe the answer is:
greens
This clue is a double definition.
'veg' is the first definition.
(I know that greens is a type of veg)
'party' is the second definition.
(the Green Party is a political party)
(Other definitions for greens that I've seen before include "Vegetables and politicians of a certain hue" , "Vegetables (found on golf courses?)" , "Putting areas" , "Leaves" , "Political party" .)