Wonderful, astonishing (7)
I believe the answer is:
amazing
I believe this is a double definition.
'wonderful' is the first definition.
(I've seen this before)
'astonishing' is the second definition.
(synonyms)
(Other definitions for amazing that I've seen before include "Astounding, awe-inspiring" , "Sensational" , "Staggering" , "Astonishing, awesome" , "Excellent; surprising" .)