Crossword puzzle clue "eight six"

Campaign about which Rumsfeld said in 2003 "it could last six days, six weeks - I doubt six months"

TV character who has eight children and an eight-syllable last name

He played Tom Bradford, the dad in the eight-kid family on "Eight Is Enough": 3 wds.

Any eight-armed or eight-legged creature

Eight minus eight

"Six foot, seven foot, eight foot ___!"

Two, four, six, eight, etc.

Metaphor for kinetic grace ... or what this puzzle's six eight-letter answers display?