The crossword solution for the term MOOD CLUE is TONE. TONE is a literary device used to express the attitude of a writer towards a subject. It can be used to create an atmosphere or to convey a certain emotion. TONE can be expressed through the use of language, imagery, and other literary devices. TONE can also be used to create a sense of irony or sarcasm. TONE can be used to emphasize a point or to create a certain mood.