The crossword solutions for the term SONG FOR ONE are ARIA and SOLO. An ARIA is a type of song that is usually performed SOLO, often as part of an opera or musical theatre production. It is typically a dramatic and expressive piece, often featuring a SOLO vocalist accompanied by an orchestra. A SOLO is a piece of music performed by one person, either instrumental or vocal. It can be a single movement from a larger work, or a complete piece in its own right.