Related Clues:
- District that is barred to all or certain people
- District into which entry is dangerous or forbidden
- (Irrational) prohibition
- Something totally unacceptable (informal)
- Wrong numbers
- "The Sweetest ___" (Sade hit)
- Possibility that's not an option
- Something that must not be done
- Out of practice Customs won't allow it
- Jumped up bully has room to stay out of it
- It's just not done
- Second helping, to a dieter
- 'What were you thinking?!'
- Forbidden by social custom
- A profane state