Wiktionary
n. (context legal English) full ownership of something, usually land, that is free of any encumbrances.
Wikipedia
Clear title is the phrase used to state that the owner of real property owns it free and clear of encumbrances. In a more limited sense, it is used to state that, although the owner does not own clear title, it is nevertheless within the power of the owner to convey clear title. For example, a property may be encumbered by a mortgage. This encumbrance means that no one has clear title to the property. However, standard terms in a mortgage require the mortgage holder to release the mortgage if a certain amount of money is paid. Therefore, a buyer with enough money to satisfy both the mortgage and the current owner can get clear title.
According to Investopedia: "A clear title is a title without any kind of lien or levy from creditors or other parties and poses no question as to legal ownership. For example, an owner of a car with a clear title is the sole undisputed owner, and no other party can make any kind of legal claim to its ownership."
Usage examples of "clear title".
It took a lot of money for lawyer's fees before we proved we had clear title to it.
They saw that Hank possessed a number of trophies, which he had won in calf-roping contests, and also clear title to a Ford pickup truck.
If what she wanted was ownership of the cattle, she would have clear title once he and Williams were out of the way.
Careful scrutiny of many genealogical tables had affirmed to the di Bolgias, Marc, and Sir Ugo that FitzRobert owned as much clear title to the blood-splattered throne of Munster as did any living man other than the reigning monarch, and should it prove a necessityas it very well might, all things consideredto send King Tamhas to hell suddenly, a quick replacement of the water of Sir Sean would be a most handy asset.
The Bureau of National Antiquities didn't have clear title, but they did administer the estate for the Federal Government.