Stood next to current queen (4)
I believe the answer is:
rani
'queen' is the definition.
(historical term for a Hindu queen)
'stood next to current' is the wordplay.
'stood' becomes 'ran' (both can mean ran for office).
'next to' says to put letters next to each other.
'current' becomes 'I' (symbol for electric current).
'ran'+'i'='RANI'
(Other definitions for rani that I've seen before include "Raja's wife" , "Indian princess" , "Wife of a rajah" , "Raja's queen" , "Hindu queen or princess" .)