The documents are only available to people with 'security clearance' [=special permission given only to people who are approved to know or see secret things] from the government.
The car has a 'road/ground clearance' of seven inches. [=the bottom of the car is seven inches above the road/ground]
You'll have to get 'clearance' [='approval'] from management to go ahead with the project.
(..) Everdeen, what did I just say? The holo. Come on, let's go. Boggs gave it to me. What are you talking about? He did. He transferred security clearance to her. I saw him. And why would he do that? I'm on special orders from coin. To do what? To assassinate president snow. (..)2015 The Hunger Games: Mockingjay - Part 2
(..) as hard as you can. It's okay. The holo. The holo. Unfit for command. Transfer primary security clearance... Say your name. Katniss Everdeen. What did you just do? Katniss, don't trust them. Kill Peeta, if you have to. (..)2015 The Hunger Games: Mockingjay - Part 2