Thursday Morning Riddle

I’m to conquer a safe; I’m a wise kind of joke;
I’m a sidewalk division; the glass where it broke;
To confess under pressure; exposing the yolk;
I’m to solve a tough case; and the coke you can smoke.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

2 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    Crack

  2. Bill Says:

    CRACK is correct. Way to go, Asher!

    You know, I had knuckle-buckle-chuckle for this, but couldn’t come up with a fourth rhyme that would fit the answer.

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