A more thorough explanation:

Definition: A writ of privilege is a legal document that enforces or maintains a privilege. It is often used to secure the release of a person who is entitled to privilege from arrest but has been arrested in a civil suit.

Example: Let's say that a person is a member of parliament, and they are arrested for a civil offense. However, as a member of parliament, they are entitled to privilege from arrest. In this case, the person can use a writ of privilege to secure their release.

Explanation: The example illustrates how a writ of privilege can be used to secure the release of a person who is entitled to privilege from arrest. In this case, the person is a member of parliament, but there could be other situations where a person is entitled to privilege from arrest, such as a diplomat or a judge.