The term 'long-lasting curls' can be summarized by the crossword solution of 'perms'. A perm is a chemical hair treatment that is used to create long-lasting curls or waves in the hair. The process involves wrapping sections of the hair around rods and then applying a chemical solution to the hair. The chemical solution helps to break down the hair's natural bonds, allowing it to be reshaped into curls or waves. After the chemical solution is rinsed out, the hair is set in its new shape. The perm will last for several months, depending on the type of perm and the individual's hair type.