The term 'd'ORANGE' is a French phrase meaning 'of ORANGE'. It is used to refer to the House of ORANGE-Nassau, a Dutch royal family that has been in power since the 16th century. The three-letter acronym JUS stands for 'JURISPRUDENCE', which is the study of law and legal systems. Therefore, the crossword solutions for the term 'd'ORANGE' can be summarized as referring to the House of ORANGE-Nassau and the study of law and legal systems.