The term 'SEND IN A CARTON' can be solved by the crossword solution 'SHIP', which is a four-letter word. Shipping is the process of transporting goods from one place to another, usually by air, land, or sea. It is a common practice for businesses to send products in cartons, which are boxes made of cardboard or other materials. Cartons are often used to protect items during shipping and to make them easier to transport.