“Complete an impossible task … or a hint to reading three Down answers in this puzzle”

Feature of a mountain or fingerprint

Deli counter units: Abbr.

"___ dabba doo!"

Type type

Thanos, to the Avengers

Company that's the subject of the documentary "The Smartest Guys in the Room"

Football offense arrangement that resembles an inverted Y shape

High key?

Big inits. in home security