The crossword solution for the term 'ONE WITH A FLAT' is TENANT, which is a 6 letter word. A TENANT is someone who rents or occupies land, a building, or a part of a building that belongs to another person. Tenants are usually required to pay rent to the owner of the property in exchange for the right to use it. Tenants may also be responsible for other costs associated WITH the property, such as utilities and maintenance.