Tough as Nails Themeless #80

Here lies a puzzle that was too esoteric for mainstream-land. I’m still going to hold onto the seed at 19A and try and use it somewhere that DOES go out to the wider world, because I think it’s a cool word that can be clued fairly. (It is also a word that describes me.)

Tough as Nails Themeless #80 – Across Lite