The crossword solution for the term Shelley or Keats is 'ODIST', which is a reference to the Romantic poets Percy Bysshe Shelley and John Keats. Both Shelley and Keats were part of the Romantic movement in literature, which emphasized emotion, imagination, and the beauty of nature. They were both renowned for their lyrical poetry, which often explored themes of love, death, and the power of nature. The term 'ODIST' is derived from the Greek word 'ODE', which refers to a type of lyric poem.