(as) clear as vodka simile
Used to describe something very clear or transparent
The lake water is as clear as vodka. You can see fish swimming around at the bottom.
Used to describe something very understandable, especially in an ironic way to mean the opposite
What she has just explained is as clear as vodka.
Those medical terms are not exactly as clear as vodka.
State something in a very strong, clear and effective way
1. No one has an idea.
2. It is unquestionably true, certain, or certain that; it is clear that.
To appear apparently or obviously
Very clear or obvious; very simple to comprehend
The idea of the simile may be based on the characteristics of Vodka - a distilled liquor that is clear and colourless.