Crossword Genius

Open an envelope

Ross

I believe the answer is:

slit

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">open an envelope</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for slit that I've seen before include "Long straight cut" , "Narrow aperture" , "Long narrow opening" , "Narrow straight cut or opening" , "Long narrow cut" .)

I've seen this clue in The Mirror.
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