Answer: enrolling

AnswerCrossword Clue
ENROLLINGBecoming a member.
enrollingOfficially register as a member of an institution or a student on a course
enrollingWrite the name of (someone) on a list or register
enrollingENROL, to insert on a register, also ENROLL
enrollingEnter (a deed or other document) among the rolls of a court of justice
enrollingRegister (someone) as a member or student
enrollingRecruit (someone) to perform a service