| Answer | Crossword Clue |
|---|---|
| SPOONERISM | Exchange of letters |
| RATMAILSRAT | Exchange of letters by stool pigeons? |
| OTC | Exchange letters? |
| OTC | Exchange letters |
| CORRESPOND | Exchange letters |
| NYSE | Exchange letters? |
| AMEX | Stock Exchange letters |
| PENPAL | Person to exchange letters with overseas |
