Notice vehicle in front of church move forward (7)
I believe the answer is:
advance
'move forward' is the definition.
('advance' can be a synonym of 'move forward')
'notice vehicle in front of church' is the wordplay.
'notice' becomes 'ad'.
'vehicle' becomes 'van' (van is a kind of vehicle).
'in front of' means one lot of letters go next to another.
'church' becomes 'ce' (abbreviation for Church of England).
'ad'+'van'+'ce'='ADVANCE'
(Other definitions for advance that I've seen before include "Put forward (a theory)" , "Move along" , "Go ahead - make a loan" , "Payment ahead of due date (1'7)" , "Forward movement, a change for the better" .)