The term ELABORATE SOLO is composed of two words: 'ELABORATE' and 'SOLO'. ELABORATE means to add detail or complexity to something, while SOLO means to perform alone. In the context of a crossword puzzle, the solutions ARIA (4 letters) and SCENA (5 letters) are both musical terms. An ARIA is a type of song typically sung by a SOLO performer in an opera or other musical theater production, while a scena is a longer piece of music that may include several arias. Therefore, the term ELABORATE SOLO can be interpreted as a SOLO performance that is complex and detailed.