There is no shortcut method to cure
Cluttering.
However Therapy will help
Cluttering is a fluency disorder characterized by a rate that is perceived to be abnormally rapid, irregular, or both for the speaker (although measured syllable rates may not exceed normal limits). These rate abnormalities further are manifest in one or more of the following symptoms: an excessive number of disfluencies, the majority of which are not typical of people with stuttering".
In this people tend to speak really fast & there words are overlapping and sometime due to fast rate of speech certain words become misarticulated.
Like stuttering, cluttering is a fluency disorder, but the two disorders are not the same. Cluttering involves excessive breaks in the normal flow of speech that seem to result from disorganized speech planning, talking too fast or in spurts, or simply being unsure of what one wants to say. By contrast, theperson who stutters typically knows exactly what he or she wants to say but is temporarily unable to say it. To make matters even more confusing, since cluttering is not well known, many who clutter are described by themselves or others as "stuttering." Also, and equally confusing, cluttering often occurs along with stuttering.
Because clutterers have poor awareness of their disorder, they may be indifferent or even hostile to speech-language pathologists. Delayed auditory feedback (DAF) is usually used to produce a more deliberate, exaggerated oral-motor response pattern. Other treatment components include improving narrative structure with story-telling picture books, turn- taking practice, pausing practice, and language therapy.