Envious politician (5)
I believe the answer is:
green
I believe this clue is a double definition.
'envious' is the first definition.
(thesaurus)
'politician' is the second definition.
(eg member of the Green Party)
(Other definitions for green that I've seen before include "Proverbial constituent of our moon" , "Lacking experience (on the golf course?)" , "Environmentally sound" , "Unripe; environmentalist" , "driver may go on it" .)