Crossword puzzle clue "need for prompt action"

Prompt's prompt

Need for prompt action

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

Situation demanding prompt action

Prompt into action

One might prompt a need for seed

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."