Astonish, amaze (7)

I believe the answer is:

astound

I believe this is a double definition.

'astonish' is the first definition.
(synonyms)

'amaze' is the second definition.
(synonyms)

(Other definitions for astound that I've seen before include "Amaze, astonish" , "Shock, surprise greatly" , "Flabbergast" , "floor" , "Bewilder" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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