Astonishing, wondrous (3-9)
I believe the answer is:
awe-inspiring
I believe this clue is a double definition.
'astonishing' is the first definition.
(I've seen this before)
'wondrous' is the second definition.
(I've seen this before)
(Other definitions for awe-inspiring that I've seen before include "Wondrous" , "Breathtaking" , "Astonishing" , "Magnificent" , "Invoking wonder" .)