Crossword puzzle clue "kind of glass or grass"

Kind of glass or grass

Grass court grass

Writer of the lines "Pigeons on the grass alas. / Pigeons on the grass alas"

Ground covered by a mat of grass and grass roots

Cartoon in which one cow says to another "Hey, wait a minute! This is grass! We've been eating grass!"

Glass in the grass, alas!

Like the glass, when viewed by someone who's pessimistic about how much liquid is in the glass

Small glass disk used as an ornament in a stained-glass window