A quick wash (5)
I believe the answer is:
This could be a double definition.
'a quick' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'wash' is the second definition.
(rinsing is a kind of washing)
Can you help me to learn more?
(Other definitions for rinse that I've seen before include "Wash off surface dirt", "Use water to remove soap", "Run water through", "Cleanse in water", "Flush".)