Stagger to us, and drunkenly! (7)
I believe the answer is:
astound
'stagger' is the definition.
(I've seen this before)
'to us and drunkenly' is the wordplay.
'drunkenly' indicates anagramming the letters.
'to'+'us'+'and'='tousand'
'tousand' with letters rearranged gives 'ASTOUND'.
(Other definitions for astound that I've seen before include "Bewilder" , "Stagger" , "Shock, surprise greatly" , "Startle" , "Bowl over" .)