Current about to employ charge (6)
I believe the answer is:
accuse
'charge' is the definition.
(charge in court)
'current about to employ' is the wordplay.
'current' becomes 'ac' (alternating current).
'about' becomes 'c' (abbreviation for circa).
'to employ' becomes 'use' (synonyms).
'ac'+'c'+'use'='ACCUSE'
(Other definitions for accuse that I've seen before include "Charge with a crime" , "Charge with wrong-doing" , "Charge with, indict" , "Lay blame for wrongdoing on named person" , "Indict, blame wrongdoing on" .)