1) Woman in disguise 
• (n.) The state of being in disguise; -- said of a woman. • (n.) A woman who is unknown or in disguise.
In·cog'ni·ta noun [ See Incognito .] 1. A woman who is unknown or in disguise. 2. The state of being in disguise; -- said of a woman. 
incognita 1. A woman or girl whose identity is disguised or concealed. 2. A woman who is unknown or in disguise.
(of a woman or girl) incognito.