Possible Clues:

• Oath or cuss -- but not bad?
• What is another term for a bit of strong language (seven of which in the puzzle will help you solve one of the meta answers)? A) Figure of speech | B) Five-dollar word | C) Four-letter word | D) Four-word phrase
• 'Oath', for example -- is this?
• Cross about our tenant, wife gives curse
• One piece of text many deem tabu
• One's neither red nor green, but may be blue?
• This is — but isn't — 21
• What's tabu?
• What many shun, more or less?
• Like 3 or 11 � **** -- or not!