Crossword puzzle clue "harder to dig up"

"... ___ again, harder, harder!" (football cheer)

Alt.country singer Case whose "The Worse Things Get, The Harder I Fight, The Harder I Fight, The More I Love You" comes out tomorrow

Harder to dig up

If you dig old things, dig this

Harder to penetrate

No harder than

Kind of tray that's harder to find nowadays

"We try harder" company