The term 'SPEAKS UNCLEARLY' can be described by two crossword solutions: 'MUMBLES' (7 letters) and 'SLURS' (5 letters). Mumbling is a type of speech characterized by low volume and indistinct articulation, while slurring is a type of speech characterized by running words together and speaking in a slow, drawling manner. Both mumbling and slurring are forms of unclear speech, and can make it difficult for the listener to understand what is being said.