All that can presently (December 2022) be gleaned about
Clarissa Agnew from sheet music covers and by Internet searching is that she was presumably an American actress/singer who has been featured on just one work namely
Wheeling, Wheeling (1895) music by
Frank P. Banta, words by Jess Danzig and published by
Howley, Haviland & Dresser, New York, USA
Her portrait on the left is taken from that same work.
Surfers are welcome to contribute any further information about this performer.