The term CONCERTO CONCLUSION is a musical term referring to the end of a concerto, which is a type of classical music composition. The crossword solution for this term is CODA, which is a four-letter word. A CODA is a passage of music that serves as a conclusion to a piece or section of a piece. It typically contains material that has been heard before in the piece, but it is often extended or elaborated upon. In a concerto, the CODA is the final section and serves to bring the piece to a satisfying close.