Crossword puzzle clue "feet first action often"

Roughly 15 feet by 6 feet by 5 feet, for the Focus?

Feet-first action, often

It doesn't convey ferocious fuel-burning action, action, action! when it's regular-sized

5 feet to 10 feet and 60 meters to 120 meters

Animal with four toes on its front feet and three toes on its back feet

Piece of the action, or a shout that stops the action

Who said "Action may not always bring happiness, but there is no happiness without action."

They often get under one's feet