Cross-dressing

• Bitch's Brew (Harry Potter) by Death ofme
  Re-telling of "Fitcher's Bird". Investigating the disappearances of several young wizards, Hermione finds the trail leading to a dead woman: Bellatrix Lestrange. What lies in the lost Black estate? What dark secrets does the last room hold?

Illyria

• (4) Such Disguise (Doctor Who) by TARDIS Stowaway
  A visit to a misogynistic planet requires Rose to make a little extra preparation in the wardrobe room, including a fake mustache.