The crossword solution for the term 'OBSTRUCTS THE PROGRESS OF' is 'DERAILS'. This means to prevent or impede the progress of something, usually by causing it to go off course. It can be used in a variety of contexts, such as when referring to a plan, project, or goal that has been disrupted or hindered. Derailing can also refer to a person's behavior, such as when someone tries to disrupt a conversation or derail an argument.