Possible Clues:

• Horsr riders' trail
• Horse-riding track
• Riders' route
• Gee — one can trot up that wedding aisle, as you might say!
• The way to the altar, say, that gets overridden?
• Riding route
• Bird leapt out in front of horse where the latter had right of way?
• Equestrian route
• The way for horses and groom heading for church, it's said
• The way, they say, to the altar?