The term 'CURES LEATHER' can be broken down into two crossword solutions: TANS (4 letters) and LEATHER (7 letters). TANS is a process of treating LEATHER to give it a desired color or finish. This is done by using dyes, pigments, or other treatments. LEATHER is a material made from the skin of animals, usually cows, that has been treated with chemicals and oils to make it more durable and resistant to water and other elements. Curing LEATHER is a process of treating the LEATHER with chemicals and oils to make it more durable and resistant to water and other elements.