opera

[judith ann]

solo vocal composition usually followed by aria sections e.g.Ah! Perfida by Beethoven

[Clanad]

The word you are searching for is probably scena... The title of Beethoven's work is actually Ah! perfido, (Opus 65) an aria from his work that was originally written in 1796 but not published until 1805... If you're working on a crossword it could be recitative, which is a synonym of scena...