A carbon copy employer gives prosecutor (7)
I believe the answer is:
accuser
'prosecutor' is the definition.
(I've seen this before)
'a carbon copy employer' is the wordplay.
'carbon copy' becomes 'cc'.
'employer' becomes 'user' (someone who employs or uses something).
'a'+'cc'+'user'='ACCUSER'
'gives' acts as a link.
(Other definitions for accuser that I've seen before include "Person blaming" , "One bringing a charge" , "One who brings charges" , "one to prosecute" , "One bringing charges" .)