The term 'lean to one side' can be broken down into four crossword solutions: LIST (4 letters), TILT (4 letters), CANT (4 letters), and HEEL (4 letters). LIST is an acronym for 'Lateral Inclined Support Technique, ' which is a method of supporting a structure by leaning it against another object. TILT means to move or cause to move into a sloping position. CANT is the act of tilting something away from the vertical or horizontal. Finally, HEEL is the back part of the foot below the ankle. All of these words describe the action of leaning to one side, which is the overall term being described.