Amazed to have reeled (9)
I believe the answer is:
staggered
I believe this clue is a double definition.
'amazed' is the first definition.
(staggering is a kind of amazing)
'reeled' is the second definition.
('stagger' can be a synonym of 'reel')
'to have' acts as a link.
(Other definitions for staggered that I've seen before include "Lurched, reeled" , "not to be starting together" , "Gobsmacked" , "Bowled over" , "Astonished" .)