Jack (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jack</span>' is the definition.<br/ ><span class="explanation-format__explanation">(knave can mean a jack playing card)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for knave that I've seen before include "Unscrupulous man; jack" , "Rascal; picture card" , "Jack (in playing cards)" , "A swindler" , "Blackguard" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">jack</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both are informal terms for sailor)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tar that I've seen before include "Product of coal" , "Black substance, used on roads" , "Product of burning tobacco" , "Sailor; road surface" , "Slang sailor or road surfacing material" .)