Exploitation (5)
(Other definitions for abuse that I've seen before include "Treat badly - hurl insults" , "Given poor treatment" , "Deceit" , "Treat badly; insult" , "Insulting language" .)
'exploitation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for use that I've seen before include "Employ or exploit" , "consume; exploit" , "Value" , "Employ; consume" , "Employ - custom" .)