Like the water to jump across? (5)

I believe the answer is:

clear

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'jump across?' is the definition.
(jumping across is a kind of clearing)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for clear that I've seen before include "Jump over without contact" , "Distinct - obvious" , "Acquit" , "Understandable" , "Disengaged" .)

I've seen this clue in the Evening Standard.

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