Marvelled or questioned (8)
I believe the answer is:
wondered
I believe this clue is a double definition.
'marvelled' is the first definition.
(I've seen this before)
'questioned' is the second definition.
('wonder' can be a synonym of 'question')
(Other definitions for wondered that I've seen before include "Felt curiosity or doubt (about something)" , "Was pondering" , "Questioned or marvelled" , "Speculated" , "Mulled over, questioned" .)