The term 'Fingerboard BAR' is composed of two words, 'Fingerboard' and 'BAR'. The first word, 'Fingerboard', refers to the flat surface on a stringed instrument, such as a guitar or violin, which contains the frets. The second word, 'BAR', is a metal strip that is placed across the fingerboard and pressed down to change the pitch of the strings. The crossword solution for this term is 'FRET', which is a small raised BAR on the fingerboard that is used to stop the strings and create different notes.