Related Clues:

• It's 35 across upstairs
• About the knight back upstairs
• Errs about one upstairs
• Choir accessory
• One getting up
• Revolting individual given a step up
• Early bird in flight?
• This part of stair is erect
• A rebel one got out of bed
• One is vertical in flight
• One was recently asleep through part of flight
• 'Get up, Knight! The Queen!' - and he does
• King: then should Queen be a bit of a step up?
• It gives height in flight
• Vertical part of step