1) American fantasy novel 2) American superhero 3) An agitator 4) Brand 5) DAW Books book 6) DC Comics superhero 7) Female supervillain 8) Firewood 9) Golden Age superhero 10) Human spark plug 11) Madcap 12) Rabble-rouser 13) Tearaway 14) Troublemaker Found on https://www.crosswordclues.com/clue/firebrand
Fire'brand` noun 1. A piece of burning wood. L'Estrange. 2. One who inflames factions, or causes contention and mischief; an incendiary. Bacon. Found on http://www.encyclo.co.uk/webster/F/32
The Blackburn B 37 Firebrand was a British single-seat torpedo-carrier and Fleet Fighter aircraft of the Second World War, first flown in 1945. The Found on http://www.probertencyclopaedia.com/browse/IF.HTM