The term 'wise guy' is often used to describe someone who is clever, knowledgeable, and sometimes a bit of a JOKER. The crossword solutions for this term include SMARTY (6 letters), JOKER (5 letters), SOLON (5 letters), OWL (3 letters), Oha (3 letters), DON (3 letters), GURU (4 letters), SAGE (4 letters), Smty (4 letters), Aleck (5 letters), SWAMI (5 letters), SAVANT (6 letters), Smartie (7 letters), Smartass (8 letters), Smartalec (9 letters), Smartaleck (10 letters), and Smartypants (11 letters). All of these words refer to someone who is wise, intelligent, and often humorous.