Possible Clues:

• The editors of Inkubator crosswords, e.g
• This puzzle's authors, e.g
• Ladies and Gents south of Waterloo vacant
• Marchers of January 21, 2017
• Group underrepresented in Congress
• Those for whom 19/22 is reserved, according to Madeleine Albright (5,3,4,4,5,5)
• The main characters in 'Her Story,' for example
• Composition of "The Squad" in Congress
• "Believe ___" (58-Across slogan)
• All performers at Lilith Fair