Covetous emotion (4)
I believe the answer is:
envy
'covetous emotion' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for envy that I've seen before include "Jealous emotion - deadly sin" , "One of the 7 deadly sins" , "grudging discontent" , "Resentful longing" , "Resentful feeling" .)