Gullible person (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gullible person</span>' is the definition.<br/ ><span class="explanation-format__explanation">(mug can mean a gullible or foolish person)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for mug that I've seen before include "Drinking vessel for one easily deceived" , "Fool - face - vessel" , "Drinking vessel, by gum" , "Large cup without a saucer" , "simpleton" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gullible person</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 sap that I've seen before include "dig tunnels" , "Charlie" , "Moisture in wood of a tree" , "Imbecile" , "tunnel" .)