The term 'USE YOUR SCULL' is a phrase that encourages people to use their own intelligence and knowledge to solve a problem. The crossword solutions for this term are ROW (3 letters) and OAR (3 letters). ROW is an action verb that means to propel a boat through the water by means of oars. An OAR is a long pole with a flat blade at one end, used to ROW a boat or as a lever to move it through the water. Therefore, the phrase 'USE YOUR SCULL' can be interpreted as using your own intelligence and knowledge to propel yourself forward in life.