The text plays on the expectation that a clean desk is typically a sign of an organized mind or work environment. However, it humorously subverts this expectation by suggesting that the cleanliness of the desk is due to clutter being hidden away in the desk drawer. While this is a form of wordplay, it does not rely on different meanings of the same word or similar-sounding words.
A clean desk is a sign of a cluttered desk drawer .