Like violas and English horns

The answer to the crossword question “Like violas and English horns is ALTO” is referring to the musical term “alto” which is used to describe a type of voice or instrument. The word “alto” can be used to describe a lower range female voice or a higher range male voice, as well as specific instruments such as the viola and English horn. In music notation, alto is often written on the clef as a small letter “a” and is situated between the bass and treble clefs. The term can also refer to a specific musical part or line that is written for this range of voice or instrument. Overall, the answer to this crossword question is simply describing the musical application of the term “alto” to certain instruments and vocal ranges.