About employer who makes things go down in America? (6)
I believe the answer is:
causer
'who makes things go down in america?' is the definition.
(go down can mean to happen in US English)
'about employer' is the wordplay.
'about' becomes 'ca' (short for circa).
'employer' becomes 'user' (someone who employs or uses something).
'ca'+'user'='CAUSER'
(Other definitions for causer that I've seen before include "One making" , "Person responsible" .)