The term 'Singing King' can be broken down into two crossword solutions: Cole (4 letters) and CAROLE (6 letters). Cole is a reference to the American singer-songwriter, actor, and record producer, Cole Porter. He was known for his sophisticated lyrics and clever rhymes, and wrote over 1, 000 songs during his career. CAROLE is a reference to CAROLE King, an American singer-songwriter who has written or co-written over 400 songs. She is one of the most successful female songwriters of all time and is best known for her 1971 album Tapestry.