Charlie, not Mike, at front of wedding coach (8)
I believe the answer is:
carriage
'coach' is the definition.
(synonyms)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for carriage that I've seen before include "Railway vehicle" , "Railway passenger coach" , "Bearing; part of train" , "Coach - bearing" , "Horse-drawn passenger vehicle" .)