In France, John isn't finished with awful resentment (8)
I believe the answer is:
jealousy
'resentment' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for jealousy that I've seen before include "Suspicious resentment" , "Envious resentment" , "Form of resentment" , "Envious emotion" , "Covetousness - envy" .)