1919 Penny Missing Letters

Struck Through Grease maybe?

My first thought was an oddly-shaped Cud, but I don't see this on the Cuds on coins website.

I'll be interested to hear what @coop thinks.

Some sort of obstruction during striking.

Note the shadow? It looks like deep die dent. Almost as deep as the highest point on the 'E' (Deepest part of the die) So when a die dent is that deep that it creates a shadow like the left ear lines, it is deep. Note the rim is still present, so it isn't a Cud. A die event happened to it. Obverse die has full rims. Reverse is also weak at 6:00. But the wheat stems are wider, so that is probably from grease. (The opposite the 'E' area where the devices are thinned. So this area may have had damage and over polished to try to save the die?)