Crossword Genius

Stared with the mouth open (5)

Ross

I believe the answer is:

gaped

(Other definitions for gaped that I've seen before include "Opened mouth wide" , "shown astonishment" , "Was yawning" , "Looked stunned" , "Stared open-mouthed - yawned" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.