Possible Clues:

• Are the geese blowing around the horse?
• You need a groom for one in the wind of so many geese
• Disorderly group's endless mirth following joke
• Colective noun for geese
• A ___ of geese
• There's the horse in the high wind along with the geese
• Are geese the cause of the broken leg around a horse?
• Cluster
• A lot of geese going outside in a strong wind
• Disorderly group