소관이 · 소관을
jurisdiction, area of responsibility (of a department)
Example
그 문제는 교육부 소관입니다.
That issue falls under the Ministry of Education.
Word parts
소 that which+관 manage
Literally 'what one manages'.
Good to know
Pattern: N 소관이다 = it's N's job; 소관 is a duty area, 관할 more a territory or authority.