The term 'Quite Unusual' can be broken down into four crossword solutions: ODD (3 letters), RARE (4 letters), OUTRE (5 letters), and BIZARRE (7 letters). ODD means not normal or regular, while RARE implies something that is not commonly found. OUTRE is an adjective used to describe something that is very strange or unusual, and BIZARRE is an even stronger word for something that is extremely ODD or peculiar. All of these words together can be used to describe something that is quite unusual.