Smart aleck (4-2-3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">smart aleck</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for know-all that I've seen before include "One who thinks they have all the answers" , "Clever clogs!" , "One supposedly omniscient" , "Boastful person who behaves like repository of information" , "Self-styled polymath" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">smart aleck</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for know-it-all that I've seen before include "Smart alec" , "Unteachable bigot" .)
(Other definitions for wiseacre that I've seen before include "Know-it-all" , "Self-appointed sage" , "Person who tries to appear clever" , "Person with an affectation of wisdom" , "One assuming air of superior wisdom - simpleton" .)