A cavatina is a short, lyrical piece of music, usually for a SOLO instrument. The term 'cavatina' comes from the Italian word for 'little song'. An AIR is a slow, lyrical melody, often used as an instrumental introduction to an ARIA. An ARIA is a type of SOLO vocal piece, usually with an operatic or dramatic character. A SOLO is a piece of music performed by a single musician. Therefore, the crossword solutions for the term 'cavatina' are AIR (3 letters), ARIA (4 letters), and SOLO (4 letters).