Crossword Genius

Surge of lawlessness, on the beaches perhaps? (5,4)

Ross

I believe the answer is:

crime wave

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

'surge' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for crime wave that I've seen before include "series of offences" , "Sudden rise in offences" , "Surge in offences" , "multitude of sins" , "Surge in lawbreaking" .)

I've seen this clue in the Sydney Morning Herald.
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