Water recycled as in space area (7,3)
I believe the answer is:
caspian sea
'water' is the definition.
(I know that Caspian Sea is a water)
'recycled as in space area' is the wordplay.
'recycled' indicates an anagram.
'area' becomes 'a' (maths abbreviation).
'as'+'in'+'space'='asinspace'
'asinspace' anagrammed gives 'caspianse'.
'caspianse'+'a'='CASPIAN SEA'
(Other definitions for caspian sea that I've seen before include "Lake bordered by both Russia and Iran" , "World's largest lake" , "There's lots of water here" , "World's largest inland body of water, fed by the Volga River" , "large expanse of water" .)