| Answer | Crossword Clue |
|---|---|
| FLAPS | Backs of envelopes |
| FLAPS | Parts of envelopes |
| CLASPS | Parts of some envelopes |
| BURS | Prickly envelopes of fruits. |
| CLASPS | Features of some envelopes |
| CLASP | Part of some envelopes |
| LTRS | Contents of some envelopes: Abbr. |
| NINEINCH | Like the width of many foot-long envelopes |
| PREINSERT | Stuff envelopes ahead of time, as for an ad mailing |
