Leaves slack-jawed (4)
'leaves slack-jawed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for awes that I've seen before include "Frightens" , "Fills with admiration" , "Inspires wonder" .)
(Other definitions for stuns that I've seen before include "Greatly surprises" , "Bruises" , "Astounds" , "Dazes, stupefies" .)