Related Clues:
- Without a letup
- Sideways up
- Upright, and what's been removed to form this puzzle's theme answers
- Make one's hair stand --
- Stan ding
- How the hair of the frightened might stand
- How hair may stand
- Working to finish without pause or interruption
- Upright individual's state
- One and minus one, continuously
- Not at the beginning and generally gone for days
- For days __ (ceaselessly)
- For days __ (nonstop)
- For weeks __ (incessantly)
- For days __ (continuously)