Impressive hitting (8)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
striking
I believe this is a double definition.
'impressive' is the first definition.
('striking' can be similar in meaning to 'impressive')
'hitting' is the second definition.
('strike' can be a synonym of 'hit')
(Other definitions for striking that I've seen before include "not working" , "Hitting or refusing to work" , "stopping work" , "Remarkable; hitting" , "Conspicuous" .)