The term 'NOW PROVEN' can be solved by the crossword solution 'TESTED', which is a 6-letter word. The term 'TESTED' means to have been put through a series of tests or experiments in order to determine its accuracy, quality, or reliability. This term is often used in scientific research and product development, where it is important to ensure that the results are accurate and reliable. In this context, the term 'NOW PROVEN' implies that the results of the tests or experiments have been verified and are now accepted as true.