The term 'less sane' can be defined as being less rational or more irrational. The crossword solutions for this term are 'dafter' (6 letters) and 'WACKIER' (7 letters). Both words are used to describe someone who is not in a state of mental stability, with 'dafter' being a more mild version and 'WACKIER' being a more extreme version. In other words, 'dafter' implies someone who is slightly irrational while 'WACKIER' implies someone who is significantly irrational.