Disgusting case of revenge beating (9)

I believe the answer is:

repulsing

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

'disgusting' is the definition.
The answer and definition can be both to do with human feelings as well as being present participle verbs.
Maybe you can see an association between them that I don't see?

'case of revenge beating' is the wordplay.
'case of' suggests removing the centre (like emptying a case).
'beating' becomes 'pulsing' (pulsing is a kind of beating).
'revenge' with its centre removed is 're'.
're'+'pulsing'='REPULSING'

Can you help me to learn more?

(Another definition for repulsing that I've seen is " Repelling".)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.