A vote having gone to the other side (6)
I believe the answer is:
across
'to the other side' is the definition.
(I've seen this in another clue)
'a vote having gone' is the wordplay.
I cannot really see how this works, but
'a' is present in the answer.
The remaining letters 'cross' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for across that I've seen before include "From side to side, like this clue" , "Transversely" , "Horizontally" , "stride - athwart" , "From side to side of (something)" .)