Heading off and travelling #amazed (6)
I believe the answer is:
aghast
'amazed' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
(Other definitions for aghast that I've seen before include "Appalled, shocked" , "Amazed" , "Very unhappy" , "Horror-stricken, filled with consternation" , "in awe" .)