Stumped (2,1,4)
'stumped' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for nonplussed that I've seen before include "was confusing" , "Flummoxed" , "Confounded" , "Surprised and confused" , "Baffled" .)
'stumped' is the definition.
(I've seen this in another clue)
This is all the clue.
(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" .)
'stumped' is the definition.
(I've seen this in another clue)
This is the entire clue.
(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" .)