The term 'more clever' can be described by four different crossword solutions: brainier (8 letters), slier (5 letters), slyer (5 letters), SMARTER (7 letters), and niftier (7 letters). Brainier means to be more intelligent, slier and slyer mean to be more cunning or crafty, SMARTER means to be more wise or knowledgeable, and niftier means to be more quick-witted. All of these words describe someone who is more clever than the average person.