Horror-struck (6)

I believe the answer is:

aghast

'horror-struck' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for aghast that I've seen before include "'Appalled, dismayed (6)'" , "Horrified, filled iwth consternation" , "What's carried in bag has teacher" , "Struck with horror" , "Stupefied with horror" .)

I've seen this clue in The Guardian, the King Feature Syndicate and The New York Times.

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