Clue: "0" button letters

Answer: OPER

Length: 4

---

Similar Clues:

• Phone letters on the "3" button (DEF with 3 letters)
• Letters on the "0" button (OPER with 4 letters)
• Letters on a phone's "0" button (OPER with 4 letters)
• Remote "Back up" button letters (REW with 3 letters)
• "Easy as" letters (ABC with 3 letters)
• "Simple" letters (ABC with 3 letters)
• Blood-typing letters, and a hint to the "transfusions" in this puzzle (ABO with 3 letters)
• Hits the "+" button (ADDS with 4 letters)
• Letters that must be bought on "Wheel of Fortune" (AEIOU with 5 letters)
• Letters before "and sometimes Y" (AEIOU with 5 letters)