The term 'parlor instrument' refers to a type of musical instrument that was popular in the 19th century. The two crossword solutions for this term are PIANO (5 letters) and SPINET (6 letters). A PIANO is a large, stringed instrument with a keyboard that produces sound when the keys are pressed. A SPINET is a smaller version of the PIANO, with shorter strings and a smaller soundboard. Both instruments are still popular today and are used in many genres of music.