Clue: Postal ref.

Answer: APO

Length: 3

---

Similar Clues:

• Refrain with sheep? (EIEIO with 5 letters)
• Refines, in a way (SMELTS with 6 letters)
• Quote, as a reference source (CITE with 4 letters)
• Not refuted (UNDENIED with 8 letters)
• Joey's refuge (POUCH with 5 letters)
• Whiffenpoof refrain (BAABAABAA with 9 letters)
• Brilliant reflections (LUSTERS with 7 letters)
• Fact-filled reference (ALMANAC with 7 letters)
• Rob Roy refusal (NAE with 3 letters)
• Refrained from talking (BUTTONEDONESLIP with 15 letters)