One taking up charges (5)
I believe the answer is:
juror
'one taking up charges' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for juror that I've seen before include "One in box in court" , "One of 12 in court" , "Court panellist" , "One of those responsible for verdict" , "One of twelve in a box?" .)