Jealous (7)
I believe the answer is:
envious
'jealous' is the definition.
(I know that jealous can be written as envious)
This is all the clue.
(Other definitions for envious that I've seen before include "Grudging of others" , "Covetous, jealous" , "Full of jealousy" , "Green, in emotion" , "Mildly jealous" .)