It's really great getting away with cheating (7,3)

I believe the answer is:

ripping off

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'cheating' is the definition.
('rip off' can be a synonym of 'cheat')

'it's really great getting away' is the wordplay.
'it's really great getting' becomes 'ripping' (I can't explain this - if you can you should believe this answer much more).
'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.

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