Crossword Genius

Surprise and confuse (7)

Ross

I believe the answer is:

nonplus

'surprise and confuse' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for nonplus that I've seen before include "Get confused" , "State of confusion" , "Cause dismay" , "Dumbfound" , "stump" .)

I've seen this clue in The Guardian and The Times.
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