The term 'most clever' can be described by a variety of words, each with a different number of letters. The six letter word 'sliest' means to be crafty or cunning. The eight letter word 'slickest' means to be smooth and polished. The six letter word 'slyest' means to be shrewd or sly. The nine letter word 'brainiest' means to be the most intelligent. The seven letter word 'keenest' means to be sharp or alert. The nine letter word 'shrewdest' means to be the most astute or sagacious. The six letter word 'cutest' means to be attractive or endearing. Lastly, the seven letter word 'NEATEST' means to be tidy or orderly. All of these words can be used to describe someone who is the most clever.