The term 'They Hold the Line' can be solved by the crossword solutions of 'Reels' (5 letters) and 'Clothespins' (11 letters). Reels are cylindrical objects used to store and dispense items such as film, rope, thread, and cable. Clothespins are small devices used to hang clothes on a line for drying. Both reels and clothespins are used to hold items in place, hence the phrase 'They Hold the Line'.