Impressive, refusing to work (8)
I believe the answer is:
striking
This clue is a double definition.
'impressive' is the first definition.
(similar in meaning)
'refusing to work' is the second definition.
(Other definitions for striking that I've seen before include "means of putting pressure on employers" , "stopping work" , "Hitting or refusing to work" , "Remarkable; hitting" , "not working" .)