Filled with shock and horror (6)

I believe the answer is:

aghast

(Other definitions for aghast that I've seen before include "Filled with consternation or horror" , "Shocked, dumbfounded" , "What's carried in bag has teacher" , "'Horrified, shocked (6)'" , "Filled with fear and consternation" .)

I've seen this clue in The Sun.

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