The term 'less ambiguous' can be described by two crossword solutions: 'surer' (5 letters) and 'clearer' (7 letters). Both words imply that something is more certain or precise, which is the definition of 'less ambiguous'. 'Surer' implies that something is more reliable or trustworthy, while 'clearer' implies that something is more easily understood. Therefore, both words can be used to describe a situation that is less ambiguous.