Crossword Genius

Water from lakes, not properly contained (5)

Ross

I believe the answer is:

leaks

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

'water from' is the definition.
I can't judge whether this definition defines the answer.

'lakes not properly contained' is the wordplay.
'lakes' anagrams to 'LEAKS'.
Though, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for leaks that I've seen before include "Unauthorised disclosures of information" , "Cracks oozing liquids or unauthorised disclosures" .)

I've seen this clue in the Evening Standard.
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