A more thorough explanation:

Definition: De non residentia clerici regis is a Latin term used in law to refer to the nonresidence of a parson employed in royal service. It was a writ that excused a parson from nonresidence because they were busy serving the Crown. Nonresidence refers to the status of living outside the limits of a particular place. In ecclesiastical law, it also refers to the absence of a spiritual person from the benefice. This was considered an offense punishable by sequestering the benefice and forfeiting part of its income.

Example: A parson who was appointed as a chaplain to the king would be excused from nonresidence through the de non residentia clerici regis writ. This meant that they could live outside their benefice and serve the Crown without facing any penalties.

Explanation: The example illustrates how the de non residentia clerici regis writ was used to excuse a parson from nonresidence because of their royal service. It also shows how nonresidence was considered an offense in ecclesiastical law and could result in the forfeiture of income from the benefice.