Crossword Genius

Nervous queasiness (informal) (12)

Ross

I believe the answer is:

collywobbles

(Other definitions for collywobbles that I've seen before include "Nervous apprehension" , "Abdominal pain (causing feelings of apprehension?)" , "Upset stomach" , "Intense anxiety" , "Feeling of apprehension" .)

I've seen this clue in The Guardian.
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