19 down: They take seconds to fight? (8)
Although I liked this clue, to my mind, it’s not quite right. The answer is duellers, but although duellers = they take seconds is fine, duellers = to fight ain’t. Expressed alternatively, it could be that duellers = they take seconds to fight, but then that’s not much of a cryptic clue.
Either way, me say bullshit.
Update: OK, so I don’t think it’s bullshit anymore.