
1) Waste water outflow
Found on
https://www.crosswordclues.com/clue/wwo

WWO is a Polish hip hop group. The letters in the group`s name originally stood for W Witrynach Odbicia. The two members of the group which originally started the underground project, which was WWO (`W Witrynach Odbicia` - `Shopping windows reflections`) or (`W Wyjatkowych Okolicznosciach` - `In exceptional circumstances`), were: Sokół ...
Found on
http://en.wikipedia.org/wiki/WWO

acronym: Waste Water Outflow
Found on
https://www.encyclo.co.uk/local/20002
No exact match found.