Split vote in Parliament (8)
I believe the answer is:
division
This clue is a double definition.
'split' is the first definition.
(I've seen this before)
'vote in parliament' is the second definition.
(term for a vote in the UK parliament)
(Other definitions for division that I've seen before include "some police?" , "Taking of a vote; partition" , "Difference of opinion" , "It can be long or short, in arithmetic" , "Part of a whole, a section" .)