Clergyman bringing six to vehicle (5)
I believe the answer is:
vicar
'clergyman' is the definition.
(I know that vicar is a type of priest)
'six to vehicle' is the wordplay.
'six' becomes 'VI' (Roman numerals).
'to vehicle' becomes 'car' (car is a kind of vehicle).
'vi'+'car'='VICAR'
'bringing' is the link.
(Other definitions for vicar that I've seen before include "Goldsmith novel ''The . . . . . of Wakefield'' (5)" , "Parson" , "Minister" , "one brought in for service?" , "One preaches" .)