Crossword puzzle clue "church answers"

How many letters are in the longest answers in this puzzle - or how many of these answers there are

Letter appearing only in down answers; its opposite appears only in across answers

Church answers

Church bells sound, I know, you wouldn't know as you're a heathen who's never stepped foot in a church before or even walked by one

Separation of church and church?

Battery found, in a way, in eight puzzle answers

Event where the number 12 is important, and a feature of 12 two-word answers in this puzzle

"Dog the Bounty Hunter" network, and a hint to the theme in this puzzle's four longest answers