A direction over scrum astonished (9)
I believe the answer is:
awestruck
'astonished' is the definition.
(I've seen this before)
'a direction over scrum' is the wordplay.
'direction' becomes 'west' (west is a kind of direction**).
'over' is a charade indicator (letters next to each other).
'scrum' becomes 'ruck' (I've seen this before).
'a'+'west'+'ruck'='AWESTRUCK'
(Other definitions for awestruck that I've seen before include "Fearful" , "full of admiration" , "open-mouthed" , "Stunned" , "overcome by wonder" .)