under someone's wing

Guided or protected by someone, as in The department head asked Bill to take Joe under his wing during his first few weeks with the firm. This metaphoric term alludes to the mother hen sheltering her chicks. [1200s]

Words nearby under someone's wing

under pain of, under par, under secretary, under someone's spell, under someone's thumb, under someone's wing, under the aegis of, under the circumstances, under the counter, under the gun, under the hammer