Prom rental is a service that provides formal wear for special occasions such as proms and weddings. The three solutions to the crossword are TUX, LIMO, and TUXEDO. TUX is a three letter word that refers to a tuxedo, a formal suit typically worn by men for special occasions. LIMO is a four letter word that refers to a limousine, a luxury vehicle often used for transportation to and from special events. TUXEDO is a six letter word that refers to a tuxedo, a formal suit typically worn by men for special occasions. Prom rental services provide these items for customers to rent for their special occasions.