Impress with strike abroad (4,4)
I believe the answer is:
blow away
'impress' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.
'with strike abroad' is the wordplay.
'with' is a charade indicator (letters next to each other).
'strike' becomes 'blow' (I am not sure about this - if you are sure you should believe this answer much more).
'abroad' becomes 'away' (I've seen this before).
'blow'+'away' is 'BLOW AWAY'.
Can you help me to learn more?
(Other definitions for blow away that I've seen before include "Shoot dead" , "really impress" .)