Related Clues:
- Biol. or bot.
- Unwelcome plant
- One undercover
- Geog. or geol.
- ___-fi (literary category)
- A high school dept.
- ___-fi (Heinlein genre)
- With 5-Down, snooping aid
- Class with the periodic table on the wall, often: Abbr.
- Thriller hero, often
- 'Alias' type
- Empirical method subj.
- One with a code name, perhaps
- 'MythBusters' subj.
- Nathan Hale, notably