The crossword solution for the term 'LOCKS PROTECTION' is 'HAIRNET', which is a seven-letter word. A HAIRNET is a type of headwear that is typically made of nylon or other synthetic fibers and is used to keep hair in place. It is commonly worn in food service, medical, and industrial settings to protect the wearer's hair from contamination. Hairnets are also used in some sports to keep long hair out of the face.