
1) Chase with a drink 2) Cleaning method 3) Give a thorough hosing
Found on
https://www.crosswordclues.com/clue/washdown

Washdown (also wash down) is the process of high-pressure cleaning with water and/or chemicals in industries such as food and beverage and pharmaceuticals. A washdown is usually a manual operation and is designed to kill bacteria and other micro-organisms. Automatic cleaning of industrial equipment is often carried out by clean-in-place (CIP) and/...
Found on
http://en.wikipedia.org/wiki/Washdown

water resulting from cleaning of equipment, walls, floors, etc., within a plant.
Found on
http://www.hach.com/chemGlossary
No exact match found.