It's great to get away with overcharging! (7,3)

I believe the answer is:

ripping off

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

'overcharging' is the definition.
Although both the answer and definition are present participle verbs, I can't understand how one could define the other.

'it's great to get away' is the wordplay.
'it's great' becomes 'ripping' (I can't explain this - if you can you should believe this answer much more).
'to get' means one lot of letters go next to another.
'away' becomes 'off' (synonyms).
'ripping'+'off'='RIPPING OFF'

'with' is the link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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.