The crossword solution for the term 'Rocker Elvis' is 'Costello'. Elvis Costello is an English singer-songwriter who rose to fame in the late 1970s. He is known for his eclectic mix of musical styles, ranging from punk and new wave to country and folk. He has released over 20 studio albums and has been nominated for several Grammy Awards. His most successful single, 'VERONICA', reached number one on the UK Singles Chart in 1989.