This describes my situation as well although she is a Buff Orp. Interestingly she is not the boss, the Silverlace is. I'm going to play this out for a little longer. As noted in my other reply, closing them in at night seems to be working and fortunately no day crowing yet.
Aart, There is no male in the flock..all hens. I have only six chicken at this time. two are silver lace, 2 are australorps, and the others including the "Rooster" are Buff Orpingtons.
I can only hope she stops. I've now been locking them all in the coop each night and so far that has stopped...
She is two years old so I'm petty sure she's a hen. She's been laying up till a month or so ago. I guess I'll wait and see although time is not on her side.
One of my hens recently started crowing at 5am religiously. I thought it was some weird anomaly and looked it up online. Apparently there is a condition due to hormones, where a hen will take on the characteristics of a rooster including crowing. I can't tell if she stopped laying since I'm not...