Lurch and astound (7)
I believe the answer is:
stagger
This clue is a double definition.
'lurch' is the first definition.
(I know that lurch can be written as stagger)
'astound' is the second definition.
(I've seen this before)
'and' acts as a link.
(Other definitions for stagger that I've seen before include "Teeter" , "move by someone under the table?" , "Pitch" , "bowl over" , "Reel, walk unsteadily" .)