Fills with disgust (6)

I believe the answer is:

appals

'fills with disgust' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for appals that I've seen before include "'Horrifies, outrages (6)'" , "Fills with dismay or horror (6)" , "Shocks" , "Fills with disgust" .)

I've seen this clue in The Irish Times.

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