| Answer | Crossword Clue |
|---|---|
| KGB | "The Kremlin Letter" org. |
| NEA | Org. whose logo features the letter pi with an arrow through it |
| USPS | Letter carrier's org. |
| FRAT | Letter man's org. |
| USPS | Letter carriers' org. |
| FRAT | Greek-letter org. |
| YMCA | Org. known by its first letter |
