Answer: professing

AnswerCrossword Clue
professingTeach (a subject) as a professor
professingHave or claim knowledge or skill in (a subject or accomplishment)
professingBe received into a religious order under vows
professingPROFESS, to affirm openly
professingAffirm one's faith in or allegiance to (a religion or set of beliefs)
professingClaim openly but often falsely that one has (a quality or feeling)