Employer the manipulative sort? (4)
I believe the answer is:
user
'employer' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for user that I've seen before include "Tech support caller?" , "Right long-established" , "Drug-taker" , "Operator (of something)" , "one has to employ" .)