Vandalising is great fun (7)

I believe the answer is:

ripping

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'vandalising' is the definition.
The answer and definition can be both to do with contact as well as being present participle verbs.
Maybe they are linked in a way I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for ripping that I've seen before include "Tearing forcefully" , "producing tears?" , "Knockout" , "Tearing - splendid!" , "Excellent; tearing" .)

I've seen this clue in the Evening Standard.

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