It appears to be a die crack, probably a pre-cud. It’s not listed, but you can check here. http://cuds-on-coins.com/lincoln-cent-retained-cuds-1909-1939/
IDK, hopefully a response. That area looks like a precud to me. Maybe I’m wrong, wouldn’t be the first time
I'm not seeing a clipped planchet. By the way. Planchets are never actually clipped. The planchet was actually punched to close to a previous planchet area so the piece was never actually there.