Answer: lecturing

AnswerCrossword Clue
LECTURINGAvocation of many authors.
LECTURINGProfessor's forte.
lecturingGive a lecture to (a class or other audience)
lecturingDeliver an educational lecture or lectures
lecturingTalk seriously or reprovingly to (someone)
lecturingLECTURE, to expound on a specific subject