Water from the sidewalk (3)

I believe the answer is:

dew

'water' is the definition.
(dew is a kind of water)

'from the sidewalk' is the wordplay.
'from' indicates the answer is hidden within the clue.
'DEW' is hidden in the letters of 'sidewalk'.

(Other definitions for dew that I've seen before include "Morning or evening condensation" , "Night-time moisture" , "Night-time condensation" , "Condensation at beginning or end of day" , "The damp of early morning" .)

I've seen this clue in the Evening Standard.

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