implicator

noun4

1. •
   Someone or something that implicates; a sign or indicator for an implicature, or one who calls attention to the implication.
2. •
   One who is involved in an unfavorable or criminal way.

   • Murder at Fermoy, Arrest of Supposed Implicators in, 5 o 5 / — 1852
3. •
   The antecedent of an implication.
4. •
   One who initiates a project.

   • Skilled assistance was presumably on the spot, however, in the persons of two doctors, the original implicators of the hospital; […] — 1881