Answer: inducer

AnswerCrossword Clue
INDUCERDraft .. motor: gas furnace component
INDUCERCatalyst
INDUCEROne who persuades.
INDUCERPersuader.
INDUCERPersuasive one
inducerone that induces (to persuade (to induce by reasoning or entreaty, also PERSWADE))
inducerpart that influences differentiation of another part
inducersubstance that has the capability of activating genes within a cell