Related Clues:

• Concerned with knight, backed one who's upstanding
• One's roused to take back knight and queen
• Up pipe
• Vertical face of a stair
• Turns up, it's about one of the nights on the radio with one of those on the up
• Early __: morning person
• Approach to a landing?
• One out of bed seen going upstairs
• Platform for a drum set
• Staircase piece
• A step up in enterprise, really
• Staircase element
• Upright piano scratched from lever meeting resistance
• Stair's face
• Part of a step in escalator is ergonomic