Dress shoe peeling? Scuff?

My dress shoes have this scuff/peel on top and I’m not sure what it’s from or what it is exactly. I’ve tried buffing it out but it’s had no effect so I’m starting to think it’s not a scuff and might be peeling. Anybody know what this is and how I can fix it? If it helps this is a pair of Clarks dress shoes I’ve owned for at least 6 years. I think they’re real leather but honestly not 100% sure