For 35D, think of the common 5 letter word meaning to fall from faith. Take off a letter ( one of the extra ones ) and you are left with the grid entry which is part of a church.
As for the lies in the title , there is an infamous phrase on page 163 of the novel which will explain all ... not for delicate eyes or ears !
Whilst I am here, can I wish all Listenerites a Happy and Brexit-free Christmas. Thanks for all the entertainment and help in 2018.