Capitol Hill staffers (5)
I believe the answer is:
aides
'capitol hill staffers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aides that I've seen before include "Military assistants to a senior officers" , "Right-hand men" , "Confidential assistants" , "Ministerial assistants" , "Helpers" .)