Answer:

IMMIE

AnswerCrossword Clue
IMMIEGlass marble
IMMIEFake aggie, in marbles
IMMIEShooting marble
IMMIEErsatz aggie, in marbles
IMMIEPlaying marble
IMMIEKid's shooter
IMMIEKid's marble
IMMIEMib's relative
IMMIEColor-streaked playing marble