Possible Clues:

• Hymnals may be found in one
• D.C.-based think tank
• Sunday seating
• Even in a Low Church, this will below the bottom of them there
• Missal site
• 'That's in church, notwithstanding (3)'
• Churchgoer's seat
• Where to get a good seat
• Seat facing the altar
• Place for flock members