Astound the keen violinist? (4,4)
I believe the answer is:
bowl over
'astound' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for bowl over that I've seen before include "Greatly surprise" , "Thoroughly delight" , "Deliver six balls on the cricket pitch" , "wow" , "Greatly impress" .)