Catch off guard (4)
'catch off guard' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for stun that I've seen before include "Shock, flabbergast" , "Nuts (anag)" , "Make senseless or dizzy with a blow" , "Make dazed or numb" , "Daze with nuts" .)
'catch off guard' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for startle that I've seen before include "Cause to feel sudden alarm" , "Take by surprise" , "Cause shock to" , "Take unawares with rattles" , "Shock, alarm" .)