Thursday Morning Riddle

I’m a burrowing mammal it’s common to whack;
I’m a blemish that’s seen on a face or a back;
An amount of a substance, as chemists keep track;
And the CTU agent who’s spying on Jack!

Who am I?

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

2 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    Mole

  2. Bill Says:

    MOLE is correct. Way to go, Asher!

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