Answer:

steelies

Answer	Crossword Clue
STEELIES	Metal marbles
STEELIES	Nickname for 1943 pennies
STEELIES	Powerful shooter marbles

STEELIES	Hard shooters
STEELIES	Playing marbles
STEELIES	Some marbles
STEELIES	Metallic playing marbles
STEELIES	Marbles.
STEELIES	Rainbow trouts, informally
STEELIES	Some playing marbles
STEELIES	Certain playing marbles

STEELIES	Shooter's supply
STEELIES	Certain mibs
STEELIES	Oldies marbles
STEELIES	Mibs of a kind

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.