Crossword puzzle clue "be more dense than water say"

Be more dense than water, say

It's less dense than quartz

Become more dense (as plots do)

Hamlet's "A little more than kin, and less than kind," e.g.

"Nothing is easier than to denounce the ___; nothing is more difficult than to understand him": Dostoyevsky

More than fair, less than great

Whence the line "A little more than kin, and less than kind"

More than never and less than twice