Crossword puzzle clue "harder to cut through"

"... ___ 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 cut through

Harder to see through, say

Harder to penetrate

No harder than

Kind of tray that's harder to find nowadays

"We try harder" company