The crossword solution for the term 'British Scientist' is 'IONISE', which is a 6 letter word. Ionise is a process in which an atom or molecule gains or loses an electron, resulting in the formation of ions. This process is used in many scientific fields, such as chemistry and physics, and is particularly important in the study of electrical conductivity. British scientists have made significant contributions to the field of ionisation, including the development of new techniques and technologies.