It pushes up the water rate as well in redevelopment (8,4)

I believe the answer is:

artesian well

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'it pushes up the water' is the definition.
The definition suggests a singular noun which matches the answer.

'rate as well in redevelopment' is the wordplay.
'redevelopment' indicates anagramming the letters.
'rate'+'as'+'well'+'in'='rateaswellin'
'rateaswellin' anagrammed gives 'ARTESIAN WELL'.

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(Other definitions for artesian well that I've seen before include "Bored source of water" , "device for getting water" , "Source of water with natural pressure" , "supply of water" .)

I've seen this clue in The Globe and Mail.

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