Crossword Genius

Judge began sporadically feeling very bad resentment (8)

Ross

I believe the answer is:

jealousy

I'm a little stuck... Click here to teach me more about this clue!

'resentment' is the definition.
(jealousy is a kind of resentment)

'judge began sporadically feeling very bad' is the wordplay.
I cannot really understand how this works, but
'judge' could be 'j' (abbreviation for judge) and 'j' is found within the answer.
'bad' could be 'lousy' (similar in meaning) and 'lousy' is found within the answer.
The remaining letters 'ea' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for jealousy that I've seen before include "Covetousness - envy" , "It is called the green-eyed monster" , "Feeling of envy" , "Suspicious resentment" , "Envious emotion" .)

I've seen this clue in The Irish Times.
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