Perplexed (10)
There are a few possibilities for this:
'perplexed' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for nonplussed that I've seen before include "Taken aback" , "Baffled" , "at a loss" , "Threw" , "Astonished" .)
'perplexed' is the definition.
('bewilder' can be a synonym of 'perplex')
This is all the clue.
(Other definitions for bewildered that I've seen before include "appearing clueless" , "Baffled" , "Confused" , "Surprised" , "Perplexed" .)
'perplexed' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for confounded that I've seen before include "Brought to confusion" , "Confused; astonished" , "Perplexed - damned" , "Surprised" , "Really annoying (nuisance)" .)
'perplexed' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for at a loss that I've seen before include "Puzzled, don't know what to say - no profit in it" , "Nonplussed" , "Puzzled and indecisive? No profit in it" , "(Running) in deficit" , "Totally bewildered" .)
'perplexed' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for bemused that I've seen before include "Deep in thought" , "Lost for words" , "Perplexed, bewildered" , "Confused, bewildered" , "In the course of puzzling" .)
'perplexed' is the definition.
('baffle' can be a synonym of 'perplex')
This is all the clue.
(Other definitions for baffled that I've seen before include "Frustrated" , "Confused" , "Completely mystified" , "Perplexed" .)
'perplexed' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lost that I've seen before include "See 10" , "Unable to find one's way" , "Unable to be found" , "Mogul empire official; rich person" , "confused" .)
'perplexed' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for quizzical that I've seen before include "Mildly perplexed" , "Questioning - teasing" , "Mocking; perplexed" , "Questioning, look say" , "Curious" .)