Possible Clues:

• Esoteric
• Concealing meaning in puzzling way as Crosaire does
• Under the church, I see, you'll find crosaire for one
• The last place you'd find Crosaire, I see
• Hidden tomb, under which one's cold
• Obscure or puzzling (as our page neighbour Crosaire)
• Like some crosswords
• Weep quietly -- it's over Charlie's description of this crossword?
• Hidden in underground cell, edges away from rodents
• Secret underground chapel about to enthral one