This phrase describes making a special effort to show excellent manners, especially during formal situations like official dinners. It is widely used when you are meeting important people, visiting someone else's home, or when parents instruct their children to behave well. It is highly similar in meaning to the phrase "mind your manners," and the two can easily be used together.

In this expression, the word "clear" does not mean to make something clean or transparent; rather, it means to get official permission or to successfully pass through a checkpoint, much like the phrase "clear security". When you arrive at an airport, you will typically go through passport control (often labeled as "immigration") and then clear customs. As a helpful tip, even though "immigrate" traditionally means moving to a new country permanently, airport "immigration" systems actually process all incoming travelers, whether they are tourists, students, or permanent residents.

This phrase emphasizes the importance of appearances, suggesting that you should adapt your wardrobe to match the expectations of your role so that others view you as a professional. A closely related phrase is "look the part," which means your overall appearance and vibe perfectly match the job or role you are performing.

There is a distinct difference between these two phrases. "Drop dead" means to suddenly collapse and die on the spot without any prior warning or symptoms. However, if you are told what to do when you encounter a bear, you shouldn't run; instead, you should pretend to be dead, which is correctly expressed as "play dead".

It emphasizes that a specific obstacle or circumstance will not change your actions or the final outcome.

In a business travel context, a social event is an opportunity to network and build relationships outside of formal meetings. Even though the setting is "social," you are still representing your company, making it crucial to "be on your best behavior" and "dress the part".