In addition to her chamber music for strings, Clarke wrote many songs. Nearly all of Clarke's early pieces are for solo voice and piano. Her 1933 "Tiger, Tiger", a setting of Blake's poem "The Tyger", is dark and brooding, almost expressionist. She worked on it for five years to the exclusion of other works during her tumultuous relationship with John Goss and revised it in 1972. Most of her songs, however, are lighter in nature. Her earliest works were parlour songs, and she went on to build up a body of work drawn primarily from classic texts by Yeats, Masefield, and A.E. Housman.