Turn vote before a grand race (6)
I believe the answer is:
gallop
'race' is the definition.
(thesaurus)
'turn vote before a grand' is the wordplay.
'turn' says the letters should be written backwards.
'vote' becomes 'poll' (polling is a kind of voting**).
'before' says to put letters next to each other.
'a grand' becomes 'ag' (I've seen this in other clues).
'poll'+'ag'='pollag'
'pollag' backwards is 'GALLOP'.
(Other definitions for gallop that I've seen before include "Run fast like horse" , "Horse-exercising track" , "Fast gait of a horse" , "Fast ride" , "Log pal in at this pace" .)