Employ wrongly (6)
I believe the answer is:
misuse
(Other definitions for misuse that I've seen before include "harm" , "Put to the wrong purpose" , "Employ or apply wrongly" , "Apply badly or incorrectly" , "Improper application" .)
I believe the answer is:
misuse
(Other definitions for misuse that I've seen before include "harm" , "Put to the wrong purpose" , "Employ or apply wrongly" , "Apply badly or incorrectly" , "Improper application" .)