The crossword solution for the term 'preclude legally' is 'ESTOP'. ESTOP is a legal term that means to prevent or prohibit someone from doing something. It is a form of injunction that is used to prevent a person from taking a certain action or to stop them from continuing an action they have already started. ESTOP is often used in court proceedings to prevent a party from making a claim or argument that would be detrimental to the other party's case.