Stumped (10)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stumped</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nonplussed that I've seen before include "was confusing" , "Flummoxed" , "Confounded" , "Surprised and confused" , "Baffled" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stumped</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 at a loss that I've seen before include "Unable to understand - no profit in it" , "how incompetent companies can operate" , "Puzzled, bewildered" , "Puzzled and indecisive? No profit in it" , "makes one puzzled" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stumped</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 up a tree that I've seen before include "Like a lumberjack" , "In great difficulties, like the rackaby baby" , "In slangy difficulties, maybe on branch" , "American in need of assistance" .)