Clue: Four-digit number, at the ATM

Answer: PIN

Length: 3

---

Similar Clues:

• Process by which an element's atomic number may be reduced, and a hint to this puzzle's theme (BETADECAY with 9 letters)
• Cousin of atmo- (AER with 3 letters)
• Relative of atmo- (AER with 3 letters)
• Atmosphere: Prefix (e.g. AER with 3 letters)
• Atmosphere: Comb. form (e.g. AER with 3 letters)
• Prefix for atmosphere (AER with 3 letters)
• It means "atmosphere" (AER with 3 letters)
• It means ''atmosphere'' (AER with 3 letters)
• Atmosphere: Comb. form. (AER with 3 letters)
• Atmosphere, in compounds (AER with 3 letters)