Crossword puzzle clue "like some dark glass"

Source of "Say! In the dark? Here in the dark! Would you, could you, in the dark?"

Like some dark glass

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

Bar glass that's half Bass, half dark malt

Dark glass formed by cooling lava

Like some tips and some glass

"It builds strong bones, but who cares in this dark, dark world..."