Clergyman brings six to vehicle (5)
I believe the answer is:
vicar
'clergyman' is the definition.
(I know that vicar is a type of clergyman)
'six to vehicle' is the wordplay.
'six' becomes 'VI' (Roman numerals).
'to vehicle' becomes 'car' (car is a kind of vehicle).
'vi'+'car'='VICAR'
'brings' is the link.
(Other definitions for vicar that I've seen before include "one brought in for service?" , "Man (or woman) of the cloth" , "Local priest" , "Cleric" , "Oliver Goldsmith wrote 'The . . . . . of Wakefield'" .)