Crossword Genius

Letter opener? (4,3)

Ross

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4 9 3*

4,3

7*

'letter opener' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for dear sir that I've seen before include "Traditional intro" , "Opening words of formal letter" , "Conventional opening address to male recipient of letter" , "Conventional opening words of letter to male" , "Form of address" .)

I've seen this clue in The New York Times.
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