Crossword puzzle clue "goes back to square one"

Instrument often used in a flashback...back...back...back... *camera pans up everything goes blurry

Goes back to square one

Goes back to square one, and what's spelled out by certain letters in this puzzle

Square, in old slang, as indicated by forming a square with one's hands

"Push 'em back! Push 'em back! Way back!"?

Back-to-back-to-back championships

Square part of a square meal?

___ Square (Times Square, once)