The crossword solution for the term 'ALLA' is a four-letter word. It is an Italian musical term meaning 'in the manner of' or 'in the style of'. It is often used in classical music to indicate that a piece should be performed in the style of a particular composer or period. The phrase 'And to ALLA good-night' is a common phrase used to end a performance, indicating that the piece should be performed in the style of the composer or period indicated.