Crossword clues for the word: LETTEROPENER The word LETTEROPENER has appeared as an answer to at least 8 crossword clues on different crossword puzzles. Crossword clues for LETTEROPENER Showing 1 to 8 of 8 results Clue(s) *Envelope-slitting tool (letters 6-9) """Dear John,"" to the jilted" Dear for one to provide paper knife? Desk implement, or a hint to the starts of 17-, 22-, 36- and 55-Across Engraved gift for a penpal Makeshift weapon in a murder mystery Office implement Office snoop?