Scored Dutch Open shock! (7,2)
I believe the answer is:
notched up
'scored' is the definition.
(I've seen this before)
'dutch open shock' is the wordplay.
I cannot really see how this works, but
'dutch' could be 'du' (I've seen this in other clues) and 'du' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for notched up that I've seen before include "Scored" , "Registered" .)