Crossword puzzle clue "it's shared between mi and su"

It's shared between "mi" and "su"

Shared equally between two

Shared between us

Yankees manager of the '70s between two Billy Martin stints and of the '80s between two Gene Michael stints

He shared a phone booth with Bill and Ted

Initials shared by the presidential runners-up of 1928 and 1956

Title shared by works of Ovid and D. H. Lawrence

Sea shared by Uzbekistan and Kazakstan