Crossword puzzle clue "something to back up"

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

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

Back-to-back-to-back championships

Sign denoting that something is perched on something else?

Something mild after something hard

Like something deep fried vis-a-vis something oven broiled, say

Feeling that you've seen something before seen something before

Figure something out, especially something obvious