Related Clues:
- For days __ (incessantly)
- Upturned, as cartons
- Long side up
- Upturned, as a box (2 words)
- For hours __ (nonstop)
- Upright individual gets nude occasionally
- Like about-to-be-toppled dominoes
- At a single attempt: all at once
- Without a break ... or what each word in 18-, 28-, 46- and 62-Across has
- At a time
- How hairs might stand
- How unruly hair may stand
- Like hair after being rubbed with a balloon, maybe
- During a single sitting
- Standing straight, as hair