The crossword solution for the term 'unmake tracks' is 'ERASE'. This phrase is often used to describe the act of removing or undoing something that has been done. It can be used in a variety of contexts, such as erasing a mistake or erasing a trail of evidence. In this case, it is being used to describe the act of undoing something that has been done, such as a path or route that has been taken. The phrase 'unmake tracks' implies that the path or route that was taken is no longer valid and must be erased.