The term BEST-QUALITY can be broken down into three crossword solutions: PRIME (5 letters), FINE (4 letters), and AONE (4 letters). PRIME is an adjective meaning of the highest quality, FINE is an adjective meaning very good or excellent, and AONE is an adjective meaning of the highest quality. Together, these three words describe something that is of the highest quality, making BEST-QUALITY an appropriate term.