1
general::
Without any legal encumbrance, such as a lien or mortgage. For example, After the mortgage was paid off they owned the house free and clear. [Mid-1800s]
American Heritage Idioms
2
general::
Phrase(s): free and clear
without encumbrance, particularly in regard to the ownership of something. • After the last payment, Jane owned the car free and clear. • If you can’t prove that you own the house and the land it stands on free and clear, you can’t sell it.
McGrawhill's American Idioms And Phrasal Verbs